What brand of O2 did you get?

Bosch hope they last and work out alright mileage is still not perfect but it had dropped to 10.6 at its worst I just got 18.5 on my way to Reno not bad but still not the 23 24 it used to get. of course part of that could just be the fact that gas is worse than ever in california

I wonder if you need to have your fuel trims reset so the computer can relearn the O2 sensors. Sometimes just clearing any engine codes with a scantool can reset them. But if you do go that route, be forewarned, this also resets your readiness monitors which are needed for inspection.