Re: Octane for 2008 H2 with the 6.2 L
I always run regular in my 6.2L 2008. I had a bad experience with high octane gas once due to water or old gas at a Shell station. Since they don't turn over the high test gas as often I feel like it has more time to go bad and/ or absorb water due to the ethanol they put in it. Besides if you pay 20% more for high test and only get 3% better mileage then you waste money. My H2 has gobs of power so the regular gas has been fine.
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