First off i drive a 2009 cobalt SS TC

I was driving to work the other day and i pulled into a gas station and saw they had a little gass pump all buy itself and saw a street bike filling up there. So when it left I pulled into that spot to see what it was.. The sign said race fuel 110 octane, off road vehicles only.... Would I be able to run that fuel without any issues???? and would that make my car have more power????

 

You would need a tune to run 110 otherwise you would probably lose power because it is more resistant to detonation and you would need to run higher timing. With a tune for 110 you would be running roughly equivalent to e85

 

damn... need a tune for everythang now a days

 

plus its like 8.50 a gallon...

 

lol naw its only 7.20

 

I believe 110 race gas is leaded....

Check into that as well if you decide to tune for it/use it.

 

of course it needs a tune for it. it would be like trying to run 87 in a car running on the ragged edge at 93. you expect that to work no problems too? high octane doesnt automatically mean more power. its just throwing money down the drain like running my 2.2 on super unleaded would be.

 

I believe 110 is leaded.

So even if you ARE tuned for it... Kiss your cat, O2 sensors, probably some other components goodbye.

Engines really haven't been designed for leaded fuel in decades so there's no telling with an SIDI engine would do with it.

 

Sorry about bringing an old thread back up but does anyone know what the risks are with mixing 110 with 91? I have a 09 ss/tc ZFR that is tuned for 93 octane but I only have 91 available so I'm thinking of mixing 1 gallon of 110 with about 5 gallons of 91. The car has k&n sri, radiator, zzp fmic with both charge pipes, zfr turbo, 3 inch mpx exhaust, catless dp, back o2 sensor is turned off to prevent cel, zzp tuned and boost ramped, and that's all I can remember for now other than the engine and rotated tranny mount. My point is, will I be able to run it safely if I mix the fuel 1:5? It's catless so I"m not worried about that. What else should I be worried about? Thanks for any help.

 

mix 100 with 91 for 93 ..chart in link

Live in California and want 93 Octane for the Diablo performance tune? Look here!!

 

The funny thing about that is there's no 100 octane near me. I asked every store that sells high octane fuel that I know of. Will be about a hour and a half drive away out of town. No 100 octane but there is 110. Crazy right? LOL So other than the cat being destroyed, what else would running on mixed 110 gas do? Will it really harm the engine? Or is it only going to hurt the cat? Because I'm catless now so I guess that would mean I can safely run it mixed with 91? Ratio of 1 gallon of 110 to 5 gallons of 91. I also read somewhere about corrosion if left in tank too long?

 

check motorcycle shops n such. my dealership stocks vp race fuels from 100-118 i think. also stock m5 and q16

 

I did. LOL both motorcycle shops and Honda dealership only have 110. No one wants to carry 100 because it doesn't sell as well as 110. Will I be able to run it mixed safely if I'm catless though?

 

do you have E85 near you ? get it tuned for E47

 

Orrrr, I know this might sound crazy... You could just tune for 91 and be happy?

 

this just makes too much sense

 

Yes I have e-85 near me. Brand new place that barely opened about 6 months ago or so. I'm planning to go full e-85 later down the road but I still need to smog it first, get the 4.45 tranny, get stage 1 cams and injector seals and whatever else I need to run full e-85, then go e-85. LOL I'm on the wait list for the tranny. I believe I'm fourth in line? So I have about 3k's saved up right now and that will barely be enough for the tranny. I'll save up again for the retune after I buy the tranny because the tune can wait as there are no wait lists. Or at least none that I'm aware of. LOL That's why I'm just going to mix fuel right now temporarily until I save enough to get retuned. Once retuned, I'll just stay on 91 until I can save enough to go the whole cams and e-85 route. LOL

 

yea, but I gotta save up for that. Need something to resolve the issue now! LOL

 

So does anyone know what else I should be worried about when it comes to mixing 110 with 91 other than the cat being destroyed?

 

ok, change of plans. I'm going to be mixing 91 with sunoco 104 octane. Ratio will be 1 gal of 104 to 4 gal of 91(shell). Any comments?

 

Yeaa i got one .... Booom

 

If you're that worried about it, then play it safe and just don't drive the car. If you MUST drive the car, then just don't get into boost. Simple as that.

From a technical stand point though, stoich on most race fuels is slightly richer than gas, but if you're running such a diluted mix such as you're looking to do then your trims shouldn't be TOO awful. Long and short of it, the biggest risk you will run at this point is leaning out a bit due to the difference in stoichiometric ratios of the fuels and also possibly seeing knock. Quite honestly though, I doubt you'll have much to worry about with being tuned for 93 and running 91 as long as the tune is setup for the zfr and NOT a k04. In general, most of zzp's canned tunes err on the conservative side enough to not have to worry about knock too much however there's of course no guarantee. How much boost are you currently producing and do you have any way of monitoring knock?

 

I race motocross, and from what a lot of people have told me, those pumps that are 110 octane and say "off-road vehicles only" are leaded. I use it in one of my bikes because 2-strokes love leaded gas. Not sure what the consequences would be on a car application though.

 

Do not run leaded fuel in any vehicle that use a/f or o2 sensors like our cars. As awesome as tetraethyllead is it does not get along with catalytic converters or oxygen sensors. You will ruin them only after a couple months

 

Yes, the car is tuned for 93 and the zfr. I'm boosting about 23 psi. It's boost ramped though. I don't really have a way of monitoring knock other than the stock rpd.