I run premium in my 5.3 with my tune, truck runs awesome. I should have bought the 6.2 in all honesty, but I may be trading up to a diesel sometime soon so that'll be even better
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I run 89 in the truck, and 93 in the Cruze. The 93 in the Cruze makes a huge difference, especially in the warmer months with the A/C on.
- rdnckhntr94 likes this