Is there any truth to using outboard motor oil for the rotary and if so what is
the use of it

 

2-stroke oil can be used to premix with the gas. If the stock oil metering pump is in place and working, there's no need to do this.

 

sounds like a bad idea here, marine oil is specifically designed for marine watercooled applications. I manage a marina and have heard some terrible storys about using marine oil for the wrong pourpose...

 

As a premix oil it's cheap and available everywhere. That's what I use.

But as mentioned, if your metering oil system is in tact, there's no reason to premix.

 

Metering oil system? I'm a bit lost on this one. I was wondering the reason for premixing and I found this post. I'm still lost, though.

 

I'm curious also, but why would you want to put premix in when you can put normal conventional oil in for maybe a dollar or two more.

 

I think my question was missed. I'm wondering, really, why you would want to put oil in the gas tank at all. I'm not quite sure I follow on the "metering oil system". not sure what that is.

 

A cylindrical oil distributor insert molded of flexible and resilient fluorocarbon elastomer is self-retaining and self-sealing on an inside cylindrical wall at a hollow end of a rotating shaft. The cylindrical wall of the insert has large and small perforations which define oil catching pockets exposed to an oil spray from a stationary nozzle spraying oil into the hollow end of the shaft. The shaft has drains to each oil catching pocket large enough to exhaust oil from the pockets at rates exceeding the rates at which the pockets capture oil from the spray so that the rates at which the oil is exhausted from the oil catching pockets are proportional to the areas of the pockets exposed to the spray.

http://www.freepatentsonline.com/4932501.html

As for putting oil into a gas tank, probably not a good idea, not only will your lines sludge up overtime but you will most likely run rough and lose MPG.

 

Most race Rx-7 use a premix system. 2 stroke oil is designed to mix with the gas. If you want the benefits of 2 stroke injection into the rotor housings, but want to retain the simplicity and convenience of the oil metering pump, you can get a Richard Sohn adapter. I personally use one. You can do a search of the 1st gen archive for Richard Sohn to view my setup.

 

Adding a high quality synthetic 2-cycle oil, or the Pettit racing premix product to your fuel is cheap motor insurance. Mazda designed the OMP (oil metering pump) to inject crankcase oil into the combustion chamber. Some people run Marvel Mystery oil (MMO) with good results. In my race car with no OMP I run 1oz of oil per gallon of gas. You can run less than that with a working OMP. Here is a link to the Pettit premix. http://pettitracing.com/rx8/index_faq_protek.htm

 

premixing is like stated above, a way of insuring your engine is getting properly lubricated.

 

Check. Haha. Thanks for breaking that down. so use outboard oil, 1oz per gallon of gas, is what I'm gathering?

 

I was under the impression that you aren't supposed to use a synthetic oil due to the fact that synthetic oil doesn't burn at engine temps. I'm just wondering if this is a myth, besides that it doesn't burn, cuz it won't burn.

Also, how do you know if the OMP is in working condition?

And Sgt Fox... I saw your setup and it looks sick, but that is on a 1st gen... would it work on a 2nd gen? or would you even need that? I'm a curious george.

 

thanks for asking this question this is the answer i was looking for when i asked about fuel additives in an earlier topic, guess i just asked the question the wrong way.

 

Yeah, it would. I got a buddy who bought one for his turbo II at the same time I got mine. They are even available for the RX-8

 

Okay, I have a 87 TII with 95,000 on it. Would you recommend it? If so, where do youo purchase these? and if not, when would be a good time to start looking?

 

Do some reading on whether you want to go premix or not. Then if you decide it will be beneficial to you, decide if you want an adapter and a reservoir. Details of how to purchase are in that thread you stated you saw and read.

 

okay, thank you.

 

What he said. The premix debate has been going on forever. Some swear by it, some swear at it. Others with enough experience recognize that there are times to premix and times not to and that the statement "premix is best!" is not always true.

 

I used to work at a marine dealership and had access to good quality oil for free. I had a bridgeported 13b that I used to drag race and always used pre-mix with no problems (other than blown transmissions!)

Oil - Johnson/Evinrude TCW3 oil -or- Suzuki TCW3
Ratio - 50:1 (50 parts gas, 1 part oil)

 

Did you put the oil in before you filled your tank with gas... or after? or am I totally of base?

 

Generally want to put it in before you put gas in. Mixes the oil better.

Failed OMP ruined my last engine, so premix now. 1oz to 1 gallon 2-stroke marine oil. Really handy that it comes in 16oz bottles and the gas tank is 16 gallons.

 

okay sounds good dog.

 

oops, fixed that.

 

I'll dump a bit of 2 cycle into the tank before autocrosses. But otherwise, I trust the OMP to do the job it was designed for. Last motor lived to 213,000 miles without any work to it, so it must work pretty good.

As to whether you should add oil, then gas? Well, I figure that the instant you start driving you've got all that fuel sloshing around in the tank mixing things up. I laugh when I see guys add something to their gas tank, then rock the car back and forth to mix it up.


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