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
APT wrote:
The only reason to use higher than 87 octane with the stock GM 6.0L is if it meant no ethanol vs. E10/E15.
I agree, and also the reason I filled 91 on last two fill ups.
re: my earlier post
My choices were 85 regular, 87 ethanol, or 91 no ethanol.
Jerry
