What oil and octane fuel do you use?

[priapism]

I'm surprised this hasn't been mentioned yet, but quite simply: ethanol. 87 and 89 octane have a 10% ethanol blend whereas 91 octane is not blended with ethanol. It's fine for modern engines, but our older cars don't like ethanol and that's why you'd see a difference running premium fuel. Gasoline was different when the E30 was built.

That's not true, all fuel has 10% ethanol.

[LJ851]

That's not true, all fuel has 10% ethanol.

That is not true. There are still stations selling 100% gasoline.

http://pure-gas.org/

Also. my bone stock e30 will ping on all 87 octane and some 89 octane. I run 89.

[mikeedler]

87 octane has a 10% ethanol blend whereas 89 and 91 are still at 5% here in Germany. for those that care.

I run BMW orig. 10W 40 oil and the cheapest gas I can find.
alot of times I will run a 1/2 tank of gas-diesel mix we pump out of diesel cars that fill up the wrong stuff, with another half of 87 octane. I usually can't give over half throttle without the M20 pinging like crazy- but it's free!

[Exodus_2pt0]

87 octane has a 10% ethanol blend whereas 89 and 91 are still at 5% here in Germany. for those that care.

I run BMW orig. 10W 40 oil and the cheapest gas I can find.
alot of times I will run a 1/2 tank of gas-diesel mix we pump out of diesel cars that fill up the wrong stuff, with another half of 87 octane. I usually can't give over half throttle without the M20 pinging like crazy- but it's free!

You are nuts.... But I like your style!

[stamar]

87 octane has a 10% ethanol blend whereas 89 and 91 are still at 5% here in Germany. for those that care.

I run BMW orig. 10W 40 oil and the cheapest gas I can find.
alot of times I will run a 1/2 tank of gas-diesel mix we pump out of diesel cars that fill up the wrong stuff, with another half of 87 octane. I usually can't give over half throttle without the M20 pinging like crazy- but it's free!

here in the us, the 89 is created by blending the other two, so thats impossible.

theres a tank for regular a tank for supreme.

[regnu]

Mike I like your style.. lol

m20 that needs a refresh
20w50 syn.. OD doesn't work so I have to guess when I think I've gone 3K by how much oil has burned off or leaked onto the garage floor.

87 usually @ Quick Trip because it is cheaper than most.

[Lodsin]

1991 M42 gets 10W40 Chevron & 91 Octane.
Wish California had 93 Octane available..

Cali doesn't get 93?

M20 - Castrol GTX 20-50 (Not too picky on brand however)

I normally do 89 octane just because Gods chariot doesn't deserve to be treated in such a manner as putting the lowest in. Sometimes I'll throw V-Power in there just for shits and giggles. I am pretty picky when it comes to gas, I'll drive past other gas stations in hopes of a Shell.

[koophore]

20/50 for me as well...and 92 whenever possible.

[M3TROY]

Gods chariot doesn't deserve to be treated in such a manner as putting the lowest in. I am pretty picky when it comes to gas, I'll drive past other gas stations in hopes of a Shell.

lol same here, sometimes it feels like im running on fumes trying to find a shell/Mobil/BP

[Mike30e]

The eta gets Total synthetic 5W30, but I'm thinking of going to 20W50 Brad Penn dino... nobody using 5w30, I'm thinking I should change, 5W30 seems too light... Also using 91 with the MarkD chip.

[dannyyisntt]

325ix: mobile 1 10w30, 91+ octane

325is (e36): mobile 1 10w30, 91+octane

318i/335i: mobile 1 undetermined oil weight, 91+ octane

[Fusion]

If you're really interested in the oil's specs, find their datasheets.
1] resellers often get the numbers wrong online
2] they can't hide certain specifications in the datasheet that aren't on the bottle

Ie. mandatory viscosity ratings are set at 100°C, which is a DD engine temp. Only reliable oils also list vicosities much higher than 100°C. A higher viscosity index means that the viscosity changes less with temperature than a lower viscosity index.

I drink VR1 for breakfast.

[immajackuup]

0w40 mobile one full synthetic and 93octang.

[xwill112x]

Care to elaborate?

Because... Well... He is right.

Nope. The higher octane resists the actual flashpoint or ignition longer. Burns the same. Thats why you will hear pinging or knocking with low fuel qaulities because the explosion in the combustion chamber was just a touch to early. It can't resist the ignition long enough ,forcing the piston to compress a already expanded burning mix of the fuel and air

[priapism]

That is not true. There are still stations selling 100% gasoline.

http://pure-gas.org/

Also. my bone stock e30 will ping on all 87 octane and some 89 octane. I run 89.

My point was it has nothing to do with octane. That site has 5 stations in the entire state that claim to have ethanol-free gas.