Join Date: Jan 2011
Location: Monroe Center, IL
O2 Sensor Replacement
The wife has been driving around 140 miles a day, and she's racked up some miles on the GM already. It's averaging around a high 23 mpg, and 90% of that is highway driving. Even though I'm happy with the results, there is always room for improvement!
So, one question I have, is about when is a good time to replace the O2 sensors? The car has 95k on it now. I've been told that the rule of thumb is change them around 100k. Correct? Looking at the parts on Rock Auto, it seems that there are two upstream, and two downstream. I was also told that the upstream ones do most of the work, and should be the ones to get replaced. Also correct? Again, looking at Rock Auto, which brands are the better one's to get? And, are these relatively easy to replace? I don't have the sockets with the slit in them (for the wires), so it will have to be regular wrenches for me. Anyone know the size I need?
Also, since I'm here, I responded to another thread someone started about spark plug replacement. Since I'm going to 'tune it up', I was thinking of trying E3 plugs. Anyone tried them yet? I'm curious what the results were.
I'm just trying to squeeze as much mpg's as possible out if it! I am amazed that I'm even getting almost mid 20's, as my '77 LTD (without overdrive), is lucky to get half of the GM! And, the LTD is only 7" longer in wheelbase than the GM!
2000 Mercury Grand Marquis LS (Mauarder "Clone") NEW!
1968 Cougar XR-7 302 CI 4bbl
1977 Ford LTD Landau (with fender skirts!) 400 M CI