hey guys, before you say there's other threads on this i read them all.
my last tank i got 212 miles, which is completely terrible. my mods are catless utec stage 2 with an intake, tuned by junior.
i have been trying to drive conservatively being its 3.19 a gallon around here. any ideas on why its soo bad? could running catless kill the o2 sensor early? if so how much would a new one be?