save the whales, SAVE YOUR MOTOR
#226
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In my opinion, this is the best product available for the subject application
http://www.amsoil.com/storefront/ait.aspx
http://www.amsoil.com/storefront/ait.aspx
AMSOIL INTERCEPTOR Synthetic 2-Cycle Oil is formulated with a proprietary blend of the finest synthetic base oils and additives available today. This unique AMSOIL chemistry represents a breakthrough development in the field of two-cycle engine lubrication.
The backbone of AMSOIL INTERCEPTOR 2-Cycle Oil is a specially developed molecularly saturated synthetic base oil. This, combined with a potent additive package, ensures exceptional lubricity, cleanliness and optimum clean-burning characteristics. Extensive research and testing, including a full snowmobiling season in severe Rocky Mountain applications, has proven that wear on cylinders, pistons and bearings is dramatically reduced. And with up to 30 percent more detergency and dispersancy than typical two-cycle oils, AMSOIL INTERCEPTOR virtually eliminates damaging deposits on piston skirts, ring grooves and exhaust power valves.
The backbone of AMSOIL INTERCEPTOR 2-Cycle Oil is a specially developed molecularly saturated synthetic base oil. This, combined with a potent additive package, ensures exceptional lubricity, cleanliness and optimum clean-burning characteristics. Extensive research and testing, including a full snowmobiling season in severe Rocky Mountain applications, has proven that wear on cylinders, pistons and bearings is dramatically reduced. And with up to 30 percent more detergency and dispersancy than typical two-cycle oils, AMSOIL INTERCEPTOR virtually eliminates damaging deposits on piston skirts, ring grooves and exhaust power valves.
#227
~17 MPG
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IMHO, the RX-8 is a good example to show that Mazda decision makers are capable of making mistakes. It's possible the engineers made mistakes, it's also possible they warned of the possible failures but were overruled by legal, financial, marketing, or time constraints. Selling a product is rarely as simple as building the best possible product.
Are there any RX-8 owners who are familiar with the engine recalls? I haven't owned one or done much research, but some people claim that the problem was related to the OMP being programmed to inject less oil than RX-7's (and less oil than RX-8's sold in other countries), in order to comply with modern EPA requirements that the emissions systems last for 100,000 miles.
Most of those engines didn't last nearly 50k miles, from what I gather.
He's On Toroids, thanks for posting the rotary Aircraft info.
Are there any RX-8 owners who are familiar with the engine recalls? I haven't owned one or done much research, but some people claim that the problem was related to the OMP being programmed to inject less oil than RX-7's (and less oil than RX-8's sold in other countries), in order to comply with modern EPA requirements that the emissions systems last for 100,000 miles.
Most of those engines didn't last nearly 50k miles, from what I gather.
He's On Toroids, thanks for posting the rotary Aircraft info.
#230
Rx7 Wagon
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If premix has any lubricative advantage over clean 4 stroke oil applied directly to the friction surface(which it doesn't) it is negated by the absence of lubrication upon throttle closed deceleration.
Rotary aviation is recommending 1oz/1gal premix. Seems to me they take maintenance pretty seriously in the aircraft world. If they're recommending that rate for moderate engine speeds in a stockish N/A application, it logically follows that a high rpm/high horsepower/turbocharged rotary application would require a yet higher premix/fuel ratio.
It should be noted that airplanes don't often encounter throttle closed deceleration. The engine runs above idle until you get out of the plane(or maybe these people are high-altitude-stalling their cesna's). And, the omp is eliminated in this instance simply as a point of possible failure and for the carbon based benefits of 2-stroke, apparently.
2 stroke shouldnt foul plugs in low ratio's, btw. Especially that quality clean burning amsoil interceptor!
Rotary aviation is recommending 1oz/1gal premix. Seems to me they take maintenance pretty seriously in the aircraft world. If they're recommending that rate for moderate engine speeds in a stockish N/A application, it logically follows that a high rpm/high horsepower/turbocharged rotary application would require a yet higher premix/fuel ratio.
It should be noted that airplanes don't often encounter throttle closed deceleration. The engine runs above idle until you get out of the plane(or maybe these people are high-altitude-stalling their cesna's). And, the omp is eliminated in this instance simply as a point of possible failure and for the carbon based benefits of 2-stroke, apparently.
2 stroke shouldnt foul plugs in low ratio's, btw. Especially that quality clean burning amsoil interceptor!
#231
Rx7 Wagon
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Here's a thought. Just a thought.
Why don't we run 2-stoke oil in the "crank case"? Do its lubricative properties degrade more quickly? I know it would get dirty, and thats part of the problem with the OMP, but couldn't you just change your oil more often? 1k miles instead of 2k?
I'd love to hear some rational thoughts on this.
Why don't we run 2-stoke oil in the "crank case"? Do its lubricative properties degrade more quickly? I know it would get dirty, and thats part of the problem with the OMP, but couldn't you just change your oil more often? 1k miles instead of 2k?
I'd love to hear some rational thoughts on this.
#232
DGRR 2017 4/26-4/30, 2017
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I couldn't agree more.. I mean, just look at statistics of this matter
Really?? I didn't think this was an argument.. more of can you provide me with facts and more data?? instead of oil company providing you with a statement or comparison pics of an engine that's used on the track mainly vs 15+ year old engine that's driven on average of less than 2,000 miles.
Ahh.. unnecessary and I think you miss the point.
I think you miss what science is... as I kind of get a sense from your previous post. Science in fact is to show proof... and most of this so called proofs are based on in this case statistics. Again, you make it sound like OMP is EVIL... maybe in your term DEVIL. But it has shown statically over 20 years being used engines have lasted 100K plus. And in today's ownership of FD's, there are very few that are being driven as a daily car. I think when someone can't tell me what level of carbon build up is bad and kept pushing its just bad in general makes me think they themselves lack reasoning or doesn't quite understand how things work. Just remember, carbon is not bad... just at excessive. Please think about my '****" ology (someone PM'd me about that lol)
again, its not a win or loose.. Just want better facts. also, do some research about carbon and the level its consider bad. some carbon is reasonable and some consider ok and beneficial. I'll let you search that vs me spoon feeding you.
The logic (as well as the facts) is simple: four cycle oils leave deposits, two cycle oils do not (at least quilality synthetic two cycle oils...and there is abundant evidence to prove that point on countless forums). Two cycle oils are designed to burn in the combustion chamber, four cycle oils are not. Lubrication of the seals requires either direct injection or pre-mix, as in a two cycle engine, with exposure to the combustion chamber and burn-off. One is the right tool for the job, one isn't. 1+1=2. You lose this argument all day long.
Sure, and that argument is wasted on many people as well, because they are blinded by a preconceived ideology. I could argue all day long that Israel in 2010 and the history of the scripture, which pre-dates any current relevant religion, provides compelling evidence that the Bible, and the God of the Bible, are true, but not with someone with many years of false ideology engrained into their thinking. Talking to such people is like planting seeds on pavement.
Same here, you are convinced that the engineers at Mazda cannot be wrong, that the OMP is a robust engineering solution to the seal lubrication issue, and any downsides are minor. However, the fact is Mazda had other considerations when building a street car, espeically when emissions are concerned, that rule out direct injection or pre-mix of two stroke oil. Without knowing all the facts, and having a poor understanding of the merits of two stroke oils, you're stuck in your little ideology.
again, its not a win or loose.. Just want better facts. also, do some research about carbon and the level its consider bad. some carbon is reasonable and some consider ok and beneficial. I'll let you search that vs me spoon feeding you.
#233
Eats, Sleeps, Dreams Rotary
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just to add fuel to the fire...
2009+ (S2) RX-8's have a redesigned oiling system which includes not only higher oil pressure but also relocated oil filter and 2x electronically controlled, top of the engine located, oil metering pumps that feed 3 oil metering injectors per rotor housing
2009+ (S2) RX-8's have a redesigned oiling system which includes not only higher oil pressure but also relocated oil filter and 2x electronically controlled, top of the engine located, oil metering pumps that feed 3 oil metering injectors per rotor housing
#234
Goodfalla Engine Complete
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just to add fuel to the fire...
2009+ (S2) RX-8's have a redesigned oiling system which includes not only higher oil pressure but also relocated oil filter and 2x electronically controlled, top of the engine located, oil metering pumps that feed 3 oil metering injectors per rotor housing
2009+ (S2) RX-8's have a redesigned oiling system which includes not only higher oil pressure but also relocated oil filter and 2x electronically controlled, top of the engine located, oil metering pumps that feed 3 oil metering injectors per rotor housing
#235
Rock*
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Well, I'm suppose to meet up with Dr. Iannetti for lunch or dinner sometime in April. Let me ask him. If he suggest that pre-mix only is the way, well, I guess I'm convinced. I'll also ask him what the reasons are... But I'm pretty sure he will give me similar answer as when i asked him about his seals on street driven car... which is, he said, mazda spent extensive research to develop their apex seal and that he does not recommend his seals on street driven car. But I guess we'll see what he says in april.
I agree that, given that they do not rev their engines as often, it won't be very helpful for a direct comparison on carbon buildup. Also it is true that there is not any oil injected into the engine when you are not injecting fuel, I wonder if this is a concern. I know that 2 cycle oil does leave a lubricating residue behind but whether this is enough to mitigate the wear should be tested.
The comment about premix affecting the cats is definately a good one (for those of us that run them). It is my opinion that the true reason that Mazda did not use 2 stroke oil in the car may have been for many reasons, but the nail in the coffin was emissions (it barely passed anyway). Since 2 stroke oil is less combustible than gasoline, some passes through unburnt (HC). This coupled with the volume of 2 stroke oil needed to properly lubricate the engine is just an emissions disaster. Also, the 'ash' that the oil produces when burned is considered Particulate Matter. So in best the best case scenerio, where it is all fully combusted, it still fails. Premix creates more emissions than when oil is inadvertantly burned off (this, BTW only happens during higher RPMs then they dyno when testing for emissions).
This does not mean premixing is 'bad' for the engine. I believe that minimal premix can only help in lubricating the engine and I don't believe anyone has said otherwise.
The question is more about whether it affects carbon build-up. Can anyone produce hard facts for this? So far... No. I agree that if you begin using premix at the start of the engine and you build up a film of oil, it seems logical that carbon would have a more difficult time finding purchase on the surfaces (also 2 stroke oil is lighter weight then 4 stroke so it gets into the small crevices better). To me, it is more likely the excess carbon is due to the AFR ratio being so much lower in a Turbo car as opposed to a NA. The fix: use AI and rely less on extra fuel to keep your engine from detonating.
BTW, Good info on that update for the 2009 rx-8 I have no doubt it was to increase reliability through proper oil injection. From what I've read they reduced the 'extra' oil that was injected into the FDs to help meet emissions restrictions imposed on the rx-8. This caused the engines to fail earlier then expected. And now it seems like they want to do a better job with that minimum oil.
Last edited by He's On Toroids; 02-20-10 at 08:15 PM.
#236
Time or Money, Pick one
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This coupled with the volume of 2 stroke oil needed to properly lubricate the engine is just an emissions disaster. Also, the 'ash' that the oil produces when burned is considered Particulate Matter. So in best the best case scenerio, where it is all fully combusted, it still fails. Premix creates more emissions than when oil is inadvertantly burned off (this, BTW only happens during higher RPMs then they dyno when testing for emissions).
.
#238
Turd Ferguson
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for like 20+ years.
"Since all 2-stroke engines partially burn and expel their lubricant in the exhaust, the resulting exhaust residue must be rendered harmless to the environment (air, water and land). All 2-stroke oil intended for marine use and many intended for land recreational use contain Biodegrading agents. These complex chemical compounds allow the microbes found in water and in the soil to consume the hazardous chemicals and oil from the exhaust as they fall in the water or on the ground. These Biodegrading agents do nothing for the performance of the oil (sometimes they even hinder it), but they help assure us that 2-stroke engines will be around for a while."
http://www.quebecpeche.com/forums/in...-pour-2-temps/
"Since all 2-stroke engines partially burn and expel their lubricant in the exhaust, the resulting exhaust residue must be rendered harmless to the environment (air, water and land). All 2-stroke oil intended for marine use and many intended for land recreational use contain Biodegrading agents. These complex chemical compounds allow the microbes found in water and in the soil to consume the hazardous chemicals and oil from the exhaust as they fall in the water or on the ground. These Biodegrading agents do nothing for the performance of the oil (sometimes they even hinder it), but they help assure us that 2-stroke engines will be around for a while."
http://www.quebecpeche.com/forums/in...-pour-2-temps/
#239
Rock*
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I hope someone steps in and corrects me (if wrong) but I believe these Low Ash Oils were created by reducing the amount of metallic detergent in the oil (the stuff that cleans). This caused an issue with the detergency (obviously) and therefore they had to use substitute additives to help clean things up. So yes, low ash oil is improved and could help emissions over conventional oil. It can even be more environmental ...if it is all burnt. The fact is that not all premix is burned (just like fuel). And from what I hear, oil clogs Cats much worse than fuel. If you have no Cats and it is not a street car, it is my opinion that Premix can only help. With the Cats, I am starting to talk myself into just adapting the EOP/OMP to push the 2 stroke oil.
Last edited by He's On Toroids; 02-20-10 at 10:38 PM.
#240
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If they're recommending that rate for moderate engine speeds in a stockish N/A application, it logically follows that a high rpm/high horsepower/turbocharged rotary application would require a yet higher premix/fuel ratio.
It should be noted that airplanes don't often encounter throttle closed deceleration.
Also, when I spoke to Ernst at RX-7 World this weekend, he said that of the hundreds of motors he has torn down, the primary issue is how the car is driven. More carbon build up definitely occurs if you lug the motor. These engines definitely need to have the carbon blown out with a good redline run on a regular basis.
2 stroke shouldnt foul plugs in low ratio's, btw. Especially that quality clean burning amsoil interceptor!
#241
Rx7 Wagon
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That isn't logic, it's unscientific (religious) extrapolation, the same mistake made by Banzai. 256:1 works fine.
This seems to be your latest side track terminology you're throwing out without any basis, and little bearing on the topic.
Also, when I spoke to Ernst at RX-7 World this weekend, he said that of the hundreds of motors he has torn down, the primary issue is how the car is driven. More carbon build up definitely occurs if you lug the motor. These engines definitely need to have the carbon blown out with a good redline run on a regular basis.
The plugs can be partially coated (wet fouled) when the engine cools down, that's the problem, then it can be hard to re-start.
Here's a moderately relevant 2-cycle comparo regarding carbon buildup, brands, and ratio's
http://www.geistware.com/rcmodeling/...test/index.htm
#242
Turd Ferguson
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SO, what does that mean. It means that the comparison isn't correct. Taking a % of ratio and comparing it to p= +5% doesn't mean much of anything other than one is greater than the other. It's like comparing apples to oranges. Both are percentages but two percentages meaning different things.
I'll just crawl back into my research-geek hole now.
#243
Rotary Freak
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Clearance issue of the OMP adapter can be solved in 3 ways:
1. clock the OMP to clear the adapter;
2. clock the oil drain line to clear the adapter;
3. fabricate your own drain line.
For #3, I fabricated a line. I am still pre-mixing 1/2 oz of Idetmitsu oil though. This oil is so clear that it's almost like water. It does not mix well with other 2 stroke oil though.
1. clock the OMP to clear the adapter;
2. clock the oil drain line to clear the adapter;
3. fabricate your own drain line.
For #3, I fabricated a line. I am still pre-mixing 1/2 oz of Idetmitsu oil though. This oil is so clear that it's almost like water. It does not mix well with other 2 stroke oil though.
#245
Rx7 Wagon
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I'll just add that statistical significance is determined by having a reoccurring outcome at 95% or greater (meaning 5% of the time it results in a "negative" and 95% of the time a "positive") -- I use positive/negative here loosely in that you could be trying to find out any type of effects something has. In many medical research this % is even lower at 1%. Meaning that 99% of the time a person takes X pill then this outcome will occur.
SO, what does that mean. It means that the comparison isn't correct. Taking a % of ratio and comparing it to p= +5% doesn't mean much of anything other than one is greater than the other. It's like comparing apples to oranges. Both are percentages but two percentages meaning different things.
I'll just crawl back into my research-geek hole now.
SO, what does that mean. It means that the comparison isn't correct. Taking a % of ratio and comparing it to p= +5% doesn't mean much of anything other than one is greater than the other. It's like comparing apples to oranges. Both are percentages but two percentages meaning different things.
I'll just crawl back into my research-geek hole now.
I'll state it more simply. 1oz/gal of 2-cycle oil/fuel will provide a mixture that is less than 1% 2-cycle oil.
1/2 oz? 0.4%.
And, most of that will be combusted. It's atomized with the fuel and designed to burn, just like gasoline.
#246
Turd Ferguson
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You're very right. The main point was to provide some point of reference. I didn't mean to imply all that comes along with the experimental terminology and boolean logic.
I'll state it more simply. 1oz/gal of 2-cycle oil/fuel will provide a mixture that is less than 1% 2-cycle oil.
1/2 oz? 0.4%.
And, most of that will be combusted. It's atomized with the fuel and designed to burn, just like gasoline.
I'll state it more simply. 1oz/gal of 2-cycle oil/fuel will provide a mixture that is less than 1% 2-cycle oil.
1/2 oz? 0.4%.
And, most of that will be combusted. It's atomized with the fuel and designed to burn, just like gasoline.
#247
Lives on the Forum
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^^^
Looks like you could make a couple bucks fabbing replica lines for TT cars. Hint hint.
What would be super cool is if somebody could figure out how to get a single external 2-stroke oil supply to inject as the MOP does, AND into the fuel supply near the manifold, so you'd never have to manually add oil to the gas, and it wouldn't potentially gum up your fuel pump, tank, or filter.
I'd buy that.
Looks like you could make a couple bucks fabbing replica lines for TT cars. Hint hint.
What would be super cool is if somebody could figure out how to get a single external 2-stroke oil supply to inject as the MOP does, AND into the fuel supply near the manifold, so you'd never have to manually add oil to the gas, and it wouldn't potentially gum up your fuel pump, tank, or filter.
I'd buy that.
Last edited by ptrhahn; 02-23-10 at 07:28 AM.
#249
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Clearance issue of the OMP adapter can be solved in 3 ways:
1. clock the OMP to clear the adapter;
2. clock the oil drain line to clear the adapter;
3. fabricate your own drain line.
For #3, I fabricated a line. I am still pre-mixing 1/2 oz of Idetmitsu oil though. This oil is so clear that it's almost like water. It does not mix well with other 2 stroke oil though.
1. clock the OMP to clear the adapter;
2. clock the oil drain line to clear the adapter;
3. fabricate your own drain line.
For #3, I fabricated a line. I am still pre-mixing 1/2 oz of Idetmitsu oil though. This oil is so clear that it's almost like water. It does not mix well with other 2 stroke oil though.
Jono