I'm bout to put stock manifolds back on my truck with cats...and my question is should i buy new o2 sensors? been running the same one on my truck since i bought the truck brand new and have used them with my long tubes..

 

Surely won't hurt if they have a decent amount of miles on them.

 

i got 17 years and 234,000 on my OEM O2 sensors. I'll replace them when the lights go off in my dash LOL

 

Yeah those probably arent reading too well anymore lol. I think the interval is 60-100k depending on fuel quality

 

ehh, it runs great. I'm not worried. the truck is stock with a CAI and a muffler.

 

unless its throwing a light or something drastically changes, I wouldnt worry much either. Just stating what the industry suggestion is for a 4 wire heated o2

I dont even follow it, 190k or so on the Tahoe at this point and Ive never done them

Buick has 22yrs, 125k and it hunts for AFR at idle so I ordered up a pair when I ordered my oil filter. Weekend plans lol

 

If you can watch them on a scan tool, you can tell if they are working properly or not.