Whats the best oil to run in my 88 GTU during the summer in Atlanta? Brands, Synth, ect
Thanks

 

I have always used Mobil one 20W 40 (nonsyth)


But castrol GTX is also popular.

Santiago

 

no synthetic oils in Rortary engines...it isnt good for the seals leaves behind deposits. even if you loose youre (omp) i use and most people recommend castrol GTX 20/50 all season... its what i use

 

i have synthetic in mine. about 2,700 on rebuild

 

It is said you should not use (quality)synthetics during a rebuild as it will defeat the purpose of the breakin period. Should be self explanitory.

 

CASTROL GTX 20/50 right here as well.
-Galen

 

actually the previous owner put the synthetic oil and still broke it in... i got the car at about 2,600... i'm confused now (not to mention i'm dead tired as well so the brain here is a bit slow)

 

Castrol gtx 20/50 all the way here.

 

synthetic oil prevents wear, and you want a rebiult engine to wear in.

 

gotcha. need to change my oil anyhoos. might as well do it the same day i work on the oil cooler. i've a great week ahead of me...

 

mobil 20W50

 

there should be a sticky for this topic. Castrol GTX is what everyone uses.

 

^^^^^ what he said

20w50 in spring,summer,fall

10w30 in winter for storage

 

Im runnin the Castrol GTX as well, and DO NOT use synth, unless u dont mind rebuilding your motor

 

Words to live by right there....

 

http://fc3spro.com/TECH/MODS/ENGINE/OIL/brandweight.htm

 

Consensus seems to be non-syn = Castrol

But the debate on synthetic came to the conclusion that if your using a quality synthetic (Mobil 1, Royal Purple etc.), you will have less deposits than some non-synthetic oils.

I forgot his name but he did a full fledged study and calculated the deposits and found out the information stated above.

 

I believe IceMark did that research. Who ever said it, it makes plenty of snice. I use Mobile 1 15W50. I also premix and the one time I used a so called "fully synthetic" 2 stroke oil, I lost some power. don't really know why, thats just what the butt dyno said. If I were using a MOP, I would have no problem with Mobile 1 tri-synthetic in the chambers and the e-shaft.

 

Can you people please stop rehasing UNSUBSTANTIATED GARBAGE as the gospel truth.

It is getting extremely tiresome to rummage through all the garbage posts like this, especially when people are easily influenced.

Unless you have done the testing yourself, with years of trails, you are in no position to make the above statement.

With that being said, I'm not telling people to use synthetic, or making any blanket statements as to the use of it im my cars.

Just stop with the anit-synthetic bullshit paranoia!!!!

 

thanks yallCastrol gtx 20/50 sounds good to me

 

Castrol GTX 20w50 in warm seasons, 10w40 in cold.

-Andrew

 

true that. Racing beat and other well known rotary specialists say that some synthetics actually are much better at lubricating and heat dissipation. It's never been proven that synthetics cause blown motors.