That fuel must be going somewhere, either into your crankcase, or out your exhaust pipe, mine runs very clean with a 365rwhp tune, i can mash it to the floor from a stop and it hardly smokes at all

i dont know if this sounds right but i only get about 530 kms to a tank

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That equals to roughly 330 miles is this good or not i dont believe the stupid computer

Chezandy, your only getting about 13mpg roughly, thats what i was getting mixed driving hwy/town, I bought EFI live and got duramax tuners 365rwhp tune and now im getting 18mpg mixed, i have even gotten 22mpg highway:jump:

how much is it for that tune?? do you do efi live tunes

www.duramaxtuners.com Check out that site, really good stuff on there:rocking: