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Before getting a BB tune the 5.3 was getting 12.8 mpg after the tune it got 15.6 . I took out the 5.3 and installed a 6.2 L9H and now gets 19.4 , now I didn't install the 6.2 for fuel economy but it's an added perk. The MPG's are calculated also.
I put my foot in it a lot. Get around 12 in the city.I have a 2013 Chevy Tahoe 5.3L...what should i expect to average for mpg? Mostly city driving. I try to baby it as much as possible.
My 5.3 with DOD got about 14. Dod delete with cam/headers was about 13. This is a mix of 40 mph roads and stoplights.
If my 6.2 can just equal my dod-less 5.3, I'd be ecstatic. How does the 6.2 get 19.4?????