Has anyone tried out 100 octane aviation fuel in a car with a reduced pulley (JCW or other)?

Any results to tell us about, or any reason this would not be a good idea (other than a bit more cost, which is a given)?

Think with boost-enhanced cars it might be better than the 91 octane stuff we get in California, and I can get it at a small airport down the street.

Thoughts?

 

No problem, except that its not legal and the guy at the airport could get into trouble selling it for highway use. Aviation fuel (100LL), even though it is called low lead, still has much more than auto fuel and would probably not benefit new engines designed to run on low lead car gas. Older cars is a different story though, as today's gas will eventially do a number on valves and guides.

 

If you want 100, you can go to a Chevron or Shell (heck, I forgot) on Almaden in SJ. They once carried 93 a few months back If you want to know for sure, you can check out a thread on M2 with tolulene in the title. There CalCooperS mentions this station... I went there shortly thereafter.

 

Isn't an increase in octane only required to meet a car's specs and tune?
If you increased ignition timing in an ECU you might wish to increase your octane to avoid detonation, which actually slows the burning of the fuel.
Raising fuel octain levels to 100 in a Mini should only benefit the guy that sells it to you :smile:

 

Agreed.

Some guys though seek 100 to mix with a lower grade to get something more desirable. Us here in CA have 91 as premium fuel. Mixing the correct ratio of 100, while a pain, is something many will do...

 

Also, the additional lead is not good for the cat.

 

Hello. My Family owns several airports and obviously we sell lots of fuel. We also use it in our race cars.

You can actually sell Avgas (which is actually 100LL "low lead&quot for use other than airplanes, you just can't dispense it into a highway vehicle. You can put it in airboats, racecars or GAS CANS all you want. As far as the FBO knows, it's going to an airplane or whatever. As long as you don't put it straight into a car, it's
legal. You are right about the lead. Even low-lead is lead, and modern engines
(and more importantly catalytic converters) cannot take it. Older engines were designed for leaded fuel, which helps lubricate the valves and valve seats. So, just like the opposite, older cars with unleaded gas is bad combo, too. They often run bottles of lead substitute in each tank.

In other words No, I wouldn't put it in a mini.

Fear not, though! Shell is supposed to come out with 100 octane street
gas!

Hope this helps....
Ryan
http://www.autoclearguard.com

 

Yes, very helpful. HAdn't considered the lead aspect of it either. While the MINI (even JCW) doesn't need 100, with the higher boost 91 is a bit too low. I have had some pinging while running full throttle on hot days. Want to try a higher octane to see if it makes a difference. Not wanting to ruin my cat with led and not too thrilled about the idea of dumping toluene in my tank.

Maybe I'll just wait for Shell to come out with something higher than 91 here in CA.

 

just for your guys info..it's 101LL...not 100,not that it matters..lol

 

At the 1/4 mile track, I about ran out of 93, and had to put a gallon or two of 100 in to make it home. I made a few passes with the 100 octane in, enough to mix it down anyway, and it made no difference at all. note, I was driving pretty consistantly as well as times go.

 

Aviation (jet) fuel is just purified/octane'd diesel. I wouldn't put diesel in a gas engine. But it would sure make your diesel truck mean.

 

>>Has anyone tried out 100 octane aviation fuel in a car with a reduced pulley (JCW or other)?
>>
>>Any results to tell us about, or any reason this would not be a good idea (other than a bit more cost, which is a given)?
>>
>>Think with boost-enhanced cars it might be better than the 91 octane stuff we get in California, and I can get it at a small airport down the street.
>>
>>Thoughts?


DON'T DO IT... unless you like paying $1k+ for a new catalytic-converter. It shouldn't take too many tankfuls of "low-lead" or any lead gasoline to clog your cat, something that the dealer should be able to figure out and charge you for the replacement converter, regardless of warranty.