I was wondering if anyone has used 102 octane racing gas in the Z06. There is this gas station near my house that sells 102 octane. I think It's 102 or 101. And is this ok to run in the Z? Will the car run better or blow up?

 

i am guessing you have a stock tune? does your car ping on super unleaded now? if not, it won't make any difference, you have to tune the engine for higher octane gas , otherwise it just goes out the tailpipe doing nothing

 

Yes your car needs to be tuned to run the 102 octane. then you will need to run it all the time.

but YES it will RUN MUCH BETTER on 102 and the tune

 

For best power you need to run the lowest octane that does not cause pre-ignition (pinging). If you run more then all you're doing is reducing maximum power. Higher octane fuel burns slower so all things equal it will reduce cylinder pressure.

Compression ratio is the primary factor defining what octane your engine needs. Other things indirectly impact it (cam overlap, ignition timing, turbo/blower) but it all comes down to compression. If you're not running real high compression, like a race engine, then plain old premium unleaded is all you need.

 

Thanks for the info!

 

Try mixing 1/2 tank of the 102 and 1/2 a tank of 91.....See if there's a differance...................It wont hurt anything....

 

make sure it is UN-LEADED 102.

 

Most stations around me that carry this 100 or 102 octane is leaded which will destroy your cats amongst other things.I f you want perfect clean racing fuel go to a local air strip and purchase aviation fuel.

 

Absolitely KILLS 02 Sensors, and plugs cats.

Becarefull about AV-Gas too, as for it has and lacks certain additives. It's best (read safer) to buy specific racing fuel, from a reputable race shop.

 

like these guys for instance....

http://www.vpracingfuels.com/vp_02_oils.html


BTW, they only have a few quarts of gl100 gear lube left too, pretty soon VP will only sell fuels.

 

yeah avgas is low lead not unleaded and it has a lot of lead! even though they call it low lead...go figure..prob keeps tree huggers away. avgas is good to store your vehicle with though..has long shelf life

 

Atok nailed it! Run the lowest octane you can without detonation/pre-ignition. Running higher octane is actually less efficient...

 

...but, you'll never convince people of that...

 

Heh. Everybody's got to start learning at some point. Way back when, I used to put Sunoco 94 in my 1989 Formula because I thought the most expensive gas was best. Now I realize that I would have been fine with 89 octane. Let's see...six years at an extra $6 per week. $1800 down the drain...damn!

 

just use Everclear

 

 

I always love the confusion and ignorance surrounding the octane number on fuels. What amuses me most are the gas stations that pick a day of the week to have "premium at regular price!" OH wow you can imagine the morons crowding the entire station lot, waiting in line, fighting over who's in line next, and filling their cars to the max with the "super fuel." Crappy old Hondas, the worst ricers ever, old pickup trucks... you name it. And they all admit that putting premium in their hot rides gives more power and much better fuel economy. So entertaining, but it works for the gas stations to make extra money.

 

There is a difference between premium fuels and the cheapest stuff, and it isn't just the octane rating. Putting higher octane rated fuel in a car that doesn't need it won't make it run better or faster.....

BUT - THERE ABSOLUTELY IS A DIFFERENCE BETWEEN REGULAR GAS AND THE HIGHGER GRADES AND IT DOESN"T HAVE ANYTHING TO DO WITH OCTANE

Most midgrade and premium fuels have better detergent packages in them and they keep the intake system (intake ports and valves) and the fuel injectors cleaner. And this can make a substantial difference in how your car runs.

Most of the time my wife's Saturn Vue (90k miles) is run on the cheapest stuff we can find. After a while, it starts to miss, stumble and generally run like crap. We have found that a tank or two of mid-grade will clear it right up. I am sure that if I bought a bottle of Techron or other fuel injector cleaner it would likely do the same thing, but putting a tank of mid-grade in every couple of months is simply a lot easier. Regular gas from a lot of outlets has the minimum detergent required by federal law. After a while it will absolutely gunk up your intake and injectors.

Look up Top Tier gas on the net, there are companies whose regualr fuel has better detergent packages and they will absolutely keep your regular fuel burning cars running better.

 

Everclear? We call that medicinal medicine or Remedy

 

I have run cheap mom and pop gas station regular in 4 of my vehicles bought new since day 1 (a 99 Dodge 4X4 with 65K, 2001 4X4 Expedition with 62K, 2002 Dodge Neon with 66K and 2005 Toyota 4X4 with 51K). All 4 of those cars run as well today as they did the day I bought them and gas mileage has not wavered any less either. I have never put anything other than 86/87 octane regular in all of them and never had a miss, stumble or anything breakdown related to engine. Not one of them has had anything other than oil changes and air filter replacement done. 3 of our other vehicles see 91 octane premium as they require it for their compression ratios and they of course are all running fine also.

Our 2 race/street cars see leaded racing gas and they run really well.

I buy whatever is the cheapest in town on the cars I own and have never had a problem.