Quote:
Originally Posted by wickedjester
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ive read that using different octane gasoline will have difference results??
trust me i've been reading tons and tons of treads about smog and the only thing i find to be consistent to NOx levels are the CAT and EGR so im checking those things out this week..i just thought my NOx levels are unusually HIGH others that fail are in the 800-1000 mines are 1700-3000 so im seein if anyone had somewhat same levels as mines..