GMC 5.3 or 6.2 Liter Engine?
Hi everyone, I am considering trading my Chevy Diesel for a 2014 GMC Gas. I no longer need a Diesel as we tow a 25 foot Travel Trailer rather than a Fifth Wheel. I have an option of 5.3 or a 6.2 Liter...
Forum Discussion
1oldtruck wrote:NO, it does NOT require premium fuel. GM says it will run better on premium, but the recommended fuel is regular unleaded or E-85. We have run 85 octane in ours since new and it runs very good. The ONLY difference I noticed when I did run a tank of 91 octane was better mileage, but not enough to justify the price difference.
I read that the 6.2L will require premium fuel. Has anyone else found that to be true?
