Hi i tried getting some answers on my car thread but i didn't really get anything. As some of you know i bought a very clean 1979 mazda rx7 with 50k original miles the guy told me he puts pre mix in his gas tanks mixes about 2/3 of a container of marvel mystery oil and a can of chainsaw oil he said he has been doing this to his cars for years the car runs great and smooth but i don't want to ruin the engine either should i do what the guy says or not thank you guys.

 

Adding a Premix seems to be something about 1/2 the Rotary world does and the other half doesn't.
The guys at Mazdatrix recommended adding 1/2 ounce of IDEMITSU Brand Premix Rotary Fuel Lube for each gallon of gas. Most of the time I forget (old age LOL). If you want to use a premix, I recommend using something like that instead of Chainsaw oil etc.

 

I just want to do the right thing i don't want to wreck the engine or anything this guy knew his stuff had tons or Harley's had a big rig works on cars esc. But i don't know if he knows what mix to use in rx7's. What benefits will i get using premix?

 

the benefits will be that you know you're combustion chamber is lubricatedif you know your oil metering pump is working correctly you don't have to premix if it is disconnected or not working correctly you have to premix even if it is working correctly some people still premix just to be safe

 

I have a functioning MOP but i also add a valvoline premix (50:1 ratio) in my tank.

 

Theres no need to add premix if your OMP is working on a street driven car.

 

Premixing and omp is over kill in my opinion, do one or the other, omp can fail premix.. Not really, premix helps keep carbon buildup down, but if you drive the car right" a redline a day will keep the carbon away" then omp all the way, if it's a street car, n/a, stock rx7 rebuild the omp and keep it imo.

 

what is omp mean? It is stock no upgrades almost mint 79 rx7.

 

OIL Metering Pump. (OMP)

Using premix and having the stock OMP really is a bit of an overkill but it will not hurt the internals.It's just pricey for the average driven street car.(puts about 35 cents on an average gallon)

 

so adding oil to my tank will be just a waste of money?

 

Will it wreck Anything if i stop using premix for the car it sounds like that guy was putting it in since he had in which was 2011?

 

No. Its an added security or peace of mind since im constantly redlining motor (ehem not once a day) when im behind the wheel and $0.35 will not BMW (break my wallet) lol

 

You mean overheating the engine? If so the guy said the line never gets close to overheating so mebe the oil in the tank is helping.

 

Lolllll. MOP or OMP is to lubricate the internals in short, not coolant temp.


Redline is when you peg the RPM or tach past 8k RPM

 

Don't laugh at me i am new at this. I am thinking i should keep throwing the mix in i don't know everything is working perfect so mebe it is helping.

 

wont hurt except engine will smoke slightly above the norm

 

I am just wondering if it is worth throwing all that money in the tank what does it offer besides telling you the oil pump is working?

 

Run the premix until you confirm the omp is working properly, just to be safe.

The procedure for checking it is in the factory service manual, you can download one for free off the forum.

The procedure for checking the omp is you disconnect the oil lines from the carb, run the engine at 2000 rpm. The omp should pump 2.0 to 2.5 cc s in 6 minutes. (Be sure you premix during the test).

After you confirm it working properly, which I suspect it is, then forget the premix, its not needed for normal driving in a street car, imho.

 

Hmmm you should start reading the FSM and understand/learn how every part work and inter-act with each other...the "flow chart." Too bad there is no easy reading like VW for Dummies.

 

where does it show the omp is it on the light up dash?

 

It sounds like your making fun of me and calling me stupid Siraniko. I admit i don't know nearly as much as you guys i know the basics of these cars but i am trying my hardest to learn.

 

There is an actual book called vw for dummies which came out several decades ago prior to windows for dummies.. Lots of good info and short cut

 

I know that but the way you wrote it sounded like you were making fun of me.

 

In short it's a dual answer, some owners premix, some don't. Most consider it added security but, if the mop is working it's not nessacery, disadvantage is that the mop injects crankcase oil into the carb. Due to this, some guys eliminate the mop and just premix and some have even used a pass through pump system for the mop to inject clean TWC3 rated 2 stroke oil from a dedicated resivour. Thus no dirty crankcase oil in the carb.
My personal formula is 1, 1oz bottle of TWC 3 rated 2 stroke oil per tank as cheap insurance. Is it over kill yea but, I am over cautious. Basically it won't hurt anything to do it, the mmo is way overkill though.

 

Why would i do that? Lol