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 ...
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What does the owners manual say?
I am guessing 87.
If so, that is what I would run.
I am guessing 87.
If so, that is what I would run.
