None Ethanol gas

[Tyler H]

More important is to make sure the fuel is "Top Tier" certified. 91 octane minimum. As per outlined in the owners manual. Where I live Petro Canada (Sonoco) for the American peeps offer Ultra 94. I use it and am happy with it but I would use Shell or Esso (Exxon) in a pinch. Those three manufacture Top Tier certified fuels.

[jessrayo]

Originally Posted by RobertRS

Mostly true except for the percentage ratio of E85. It's 85% ethanol and 15 % dino gasoline.

Good catch, I get a little dyslexic at times.

Originally Posted by hotlapZL1

So the 93 with 10% ethanol has a blended specific heat value of 110,000 BTU/ gal and will allow full timing. ((114000*9)+74000)/10 = 110000

I'm going to use the blended 93

That looks a correct calculation. Not a huge loss in energy. But I pretty frequently pay $16.00 a gallon for top tier race fuel.

[strych9]

Ethanol is not bad for modern vehicles. As stated in an earlier post, it does produce less energy per volume than pure gasoline does. I can only get 93 octane locally with an E10 blend. It's fine.

[DavidW]

Originally Posted by Tyler H

More important is to make sure the fuel is "Top Tier" certified. 91 octane minimum. As per outlined in the owners manual. Where I live Petro Canada (Sonoco) for the American peeps offer Ultra 94. I use it and am happy with it but I would use Shell or Esso (Exxon) in a pinch. Those three manufacture Top Tier certified fuels.

Back when I had a 6.2l silverado I had a data log tune done, I used to always use and swear by shell 91 octane, the tuner asked if I was using low grade gas, I then switched to esso 91 octane, and he said that cleared up the problems he was seeing. I have avoided shell ever since, I use husky for vehicles that need the best gas 94 octane, and esso for regular fuel vehicles (87)

[hotlap]

Originally Posted by jessrayo

I pretty frequently pay $16.00 a gallon for top tier race fuel.

Is it ok to run the racing fuel through the CATs?

My car is still 100% factory at this point and I plan to run it stock this summer to make sure the engine is ok before doing any mods that might affect the warranty. If its ok, I'll fill at the track

[jessrayo]

Originally Posted by hotlapZL1

Is it ok to run the racing fuel through the CATs?

My car is still 100% factory at this point and I plan to run it stock this summer to make sure the engine is ok before doing any mods that might affect the warranty. If its ok, I'll fill at the track

You can get oxygenated 104 unleaded race fuel. You definitely don't want any leaded gas through cats. I just took the cats off my car. That has pretty much always been acceptable in Oklahoma, there has never ever been emissions testing in my little town.