what type of oil

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Jul 19, 2008 | 10:27 PM

saftysizrs

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From: fredericton, nb

what type of oil

i have an 86 turbo II rx7 that is basicly stock what type of oil does it take? when i bought the car 2 days ago it didnt have the owners manule with it

Jul 19, 2008 | 10:29 PM

JSmith0101

Play Well

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From: Green Bay, WI

Crude.

Just playin. It should have stuff like that under the hood, I think.

Otherwise just a tad over 6Q of your favorite 10w30 and an OEM filter. If you're strapped, get a really good filter, not a cheapo Fram. Do not use synthetic.

Jul 19, 2008 | 10:38 PM

Texas_Ace

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From: Texas BABY!

Quote:

Originally Posted by wotnartd

Do not use synthetic.

And why not use synthetic??

From the FAQ's:

Quote:

Can I use synthetic oils in my Rotary engined car?
Yes and no. Mazda officially does not recommend the use of synthetic oils in rotary engines, however, long term and racing use has shown that the better synthetics (Redline, Amsoil, Neo, Royal Purple, Mobil1) are perfectly fine to use in a rotary engine, and will generally result in a 1 to 2% horsepower gain. However use of poor quality synthetics (like Valvoline, Castrol Syntec, Havoline, Etc) will result in build up due to high ash content left from these oils when they are burned. It is believed that is why Mazda did not recommend synthetics, because the couldn't pick favorites.

Other notes:
The Mazda Factory racing departments recommend and use ‘synthetic’ oils including the winning 1991 Leman’s 20-G 4 rotor Mazda 787B.

MazdaComp USA printed manual (now Mazdaspeed) recommends the use of synthetic oils for racing conditions.

Redline, Amsoil and Royal Purple Synthetic Motor Oils have been used in rotary engines (both race and street) for ten plus years with excellent results.

Most Synthetic Motor Oil is compatible with the bearing material, sealing elastomer's, and combustion seals used in a rotary engine.

As you can see, it is the cheap synthetic that you should not use, good synthetic is fine and used by mazda racing.

I personally use AMSoil synthetic.

Jul 19, 2008 | 10:52 PM

Evil Aviator

Rotorhead

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From: Charlottesville, Virginia, USA

Free workshop manuals are available for download in the FAQ section:
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/frequently-asked-questions-2nd-generation-rx-7-faq-fc-494667/

Although 20W-50 is the best-protecting oil for warm regions, see the manual for the correct oil weight for the temperatures in your region. I recommend Castrol GTX non-synthetic oil for the engine, and any brand of synthetic oil (Red Line, Royal Purple, Amsoil, etc.) in the manual transmission and differential. Strangely, the Mazda brand oil filter is generally considered superior to the aftermarket brands.

In order to protect against leaks, you are supposed to replace the gasket when you remove the engine oil drain plug. I really like the aftermarket Fumoto drain valve (F-106 Regular Valve) which never needs to be replaced:
https://www.rx7club.com/general-rotary-tech-support-11/new-gasket-every-oil-change-23575/

Quote:

Originally Posted by Texas_Ace

And why not use synthetic??

Because it is a waste of money to use synthetic oil in the engine of a street car. However, that may change if the price of crude oil keeps going up, lol.

Jul 20, 2008 | 09:12 AM

mazdaverx713b

Have RX-7, will restore

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From: Ohio

i personally only use regular castrol 20W50 in ALL of my 7's. i dont drive them in the winter, so i really never go to 10W30. i will use 10W40 inthe late fall or early spring, as the temperatures will get into the 50 or 40's at times.