Chevy Trax. Old AC Delco plugs weren't bad at all. Changed at 67K. Replaced with same plugs. It seems as if I'm getting about 1 mpg better from the dashboard monitor. Seems slightly peppier as well. What say ye?
Plug change: better MPG placebo effect?
- Thread starter hardcore302
- Start date
Unless you noticed a problem with the old plugs [occasional misfire], then I say increased gas mileage is highly unlikely.
I figured as much
New plugs + thinking about fuel economy = subconsciously lighter foot on the gas pedal.
Possible. It is what it is. Good change interval to avoid possible plug seizure later on.
You can have a miss and not feel it. Had a 96 Lumina 3.1. Check engine light came on. GM scanner showed a cylinder had missed over 5000 times. Never felt a skip. Bad coil fixed it. If you have somebody with a scanner, see what it was doing.
I changed the plugs in our 2.3 EB Explorer at 60,000 miles solely because I didn't want to have problems removing them at 100,000 miles. As it was they put up some resistance removing them. I installed Motorcraft replacement plugs using anti-seize. They were still gapped within specs. No difference in running with the new plugs.
