New Chevy 6.0L gasser -- Octane?
Just bought the new Chevy 2500HD with 6.0L gas ... and wondering what you guys run for octane. And why you choose it? -- The 'why' is important too ... because it's not just about mpg, it's about ...
Forum Discussion
Redsky wrote:
Gas engines in trucks are engineered to run on regular gas. Burning a higher octane rated gas accomplishes absolutely nothing with these engines. Using a higher octane rated gas than the manufacturer specifies is about as dumb a thing as anyone can do. It will waste your money and can do nothing for the engine's performance as the higher octane gas does not have a higher btu value.
This doesn't seem to be the case for the Ford 6.2L:
Quote (taken from Ford Truck forums when the 6.2 was introduced in 2010. Mike is a engine engineer
"Originally Posted by Power Kid
Mike, I just read that the 6.2L in the Raptor has 411 hp on 91 and drops slightly to 401 on 87. Is there a drop off on the SD version as well? Or is it 385 straight across?
The Superduty version is SAE rated on 87 octane (R+M/2) so it is directly comparable to the 401 hp for the raptor. You will pick up power on the 6.2L Superduty with 91 (R+M/2).
Mike."
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