Gas Grade...

[whisler151]

call me a liar, but the dyno does not lie.

A dyno isn't a good tool to measure stuff like this, you need a fuel grade test. Too many factors differentiate on a dyno, the ambient air temp., humidity, dyno model, dyno calibration, tune on your particular vehicle, and so and so forth.

Exactly what Tejas said. There are WAY too many variables to use a dyno to measure that. Were the dyno runs done on the same dyno on the same day with the same (or similar) atmospheric conditions, comparing gas from two separate tanks?

 

[cubiefan101]

I have been runing 87 for a while and haven't had any problems. Obviously if your looking for better performance..spend the money.

 

[Nick@Apollo-Optics]

I'm going to run 93 on my next tank to see if I feel a difference.

 

[svtfan]

I been testing for a year now lol but she likes at least mid grade. I run 93 at least once a month too.

 

[CSmith]

truck has never seen anything but 93 octane

 

[mcallister]

I personally don't see any point in running anything above 87 in these trucks. It's not like your throwing boost at them or any crazy amounts of timing causing them to knock. My cobra I have to run at least 93 with a bottle of torco or 2 depending on what tune I run.

 

[Rookie]

You'll see about 1.5mpg better gas mileage. I haven't done the math to know if it's worth it but it makes me feel better inside. Lol

 

[Madcowranch]

My mileage sucks ass.

 

[Rookie]

Someone asked me once why I ran 93. Laughing, I explained it gave me a little better gas mileage. They asked why I was laughing and I said it brings me up to 13.5mpg city. Lol

 

[Cleave]

I run shell 91 octane in everything I own, and only 91 cause that's what is available in California