gtopower

ok well i did something real dumb i bought my kid a mint stock one owner 1990 rx7 gtu

and i didnt know just how fast the rx7 was and it is way to quick for a kid for sure.and i have a ton of questions maybe some of you can answer for me.number 1 someone told me there was some special oil i have to use n said its like 2 stroke oil 1 guy even said there was a place to put this special oil so it mixes with the fuel.i have no clue whatsoever lol so any and all information will be greatly appreciated heck someone even told me im suppose to put oil in the gas tank which i will not even think about doing without imperical proof thats what im suppose to do. so i found this site n joined up please set an ole man straight on my kids ride luckily i got about a month n a half till he gets his license n starts driving this lil screamer....

Nateb123

Your questions are pretty easily addressed. In a way, all the "someones" were all right. There's a few different ways an RX-7's oiling system can work. Stock from the factory, rx-7s come with an oil metering pump (OMP). This is to manage the oil which is squirted into the engine during operation. Since the rotary engine doesn't have pistons, it doesn't have the ability to keep the oil out of the way of the combustion. Obviously it burns off and so new oil is sent to the chamber to replace the lost oil. This is the OMP's function and this means rotaries burn oil under regular operation. The factory system simply allows the oil used to cool the engine (and turbo on some cars) to seal the engine's rotor faces properly. This is the case in your son's car. Just check oil when you get gas and keep it topped up without overflowing. The engine will get all the oil it needs and will run properly. Regular oil changes are still required though since the oil will degrade due to heat like with any other engine.



Some people however prefer to save weight (and I'm sure there are performance reasons for this as well) and run what is called a two-stroke premix. This is an oil that is designed to burn cleanly a well as lubricate. It's used in motorcycles, lawn mowers, chainsaws, etc. There is actually special premix designed for rotaries as well, but don't expect your gas station to carry it. It's mixed in with the gas and the gas then acts like oil and fuel. So whenever you would fill up, you would also put in a proportionate amount of premix so that the engine gets the oiling it needs. Lots of previous owners have done this and as a result there are RX-7s going around with no OMPs. I wouldn't worry too much about this alternative oiling solution though, unless the stock system isn't to your liking for whatever reason.

gtopower

thanks for all the info nate i appreciate it .so i just put regular oil in it right like 10-30w or whatever theres no special resevoir.i bought the car about a hundred miles from bc in everett wa im down on the sw coast of washington state .

phinsup

I lived in lake stevens for 6 years, welcome aboard!

Baldy

Welcome to nopistons! If you have any other questions, feel free to post in the 2nd generation specific forum, you should get plenty of answers there.

Nateb123

I'd suggest looking for a local RX-7 forum also. The benefits being that while the information here is good, it doesn't compare to having someone nearby who can help you out when something strange is going on with your car. Plus you'll eventually need parts to keep it in good condition, and paying for shipping sucks. You could also try bcrotary.com if you're down for a drive. Frankly, with the exchange rate and the amount of activity in Vancouver, it's a pretty sweet deal for any Americans looking to score some parts for very low prices.

Dramon_Killer

Most RX-7 owners prefer something heavier like 20w50.

Nateb123

Even in the dead of winter?