i wish the fuel milage was better to, but we all know the govt is not going to care about what we say about fuel milage or cost especially if they can profit off of this going green thing. i was also worried about voiding my warrantee but i am going SCT w/dpf delete in a couple weeks. i figure if anything major breaks i will change it back to stock before i drop it off. as far as oil changes in between, usualy the kid that does oil changes dont seem to concerned about the exaust. i guess just hope for the best at this point!
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