Which O2 sensor to buy??

[Oaktown 986]

Originally Posted by mptoledo

Thanks for the responses. I do appreciate them.
I want to fix my tranny noise first, but sensors are second on my list of things to do this month.

Do you guys think that will improve my MPG? I get around 23hwy, but used to get 28ish. I already did the fuel and air filter, bi yearly oil changes and new tires.

I've put about 300 miles on my 99 since I put in precat O2 sensors and a new MAF; i'm getting nearly 30 mpg up from about 20 last month. And the car's driving like brand new.

Amazing, and the O2's only took about 15 minutes after letting penetrating oil set in.