- Joined
- Dec 28, 2011
- Messages
- 5,046
Picked up a hoopdie 2006 Nissan Sentra with 160k on the clock. Runs very well, smooth and no abnormal noises. When I bought it the check engine light was on. I figured that was the O2 sensor. I changed the oil (ST) and filter; air filter; plugs; PCV valve. I need to drain fill the manual transmission and plan on replacing the upstream O2.
I have run about 600 miles on it. I use top tier 87 octane gas and ran a Techron fuel injector cleaner as well. I checked the gas mileage at last fill up (manually as this car is base and has none of the mileage toys to show you) and the hand calculation was 17mpg This 1.8 should be getting 26/28+ mix driving. Unfortunately I did not have the smarts to check the gas mileage before changing any parts. It could be me not consistent at fill up or different pumps used (but it can't be that big of a difference).
Can a bad O2 sensor cause such a drastic decrease in fuel mileage?
I have run about 600 miles on it. I use top tier 87 octane gas and ran a Techron fuel injector cleaner as well. I checked the gas mileage at last fill up (manually as this car is base and has none of the mileage toys to show you) and the hand calculation was 17mpg This 1.8 should be getting 26/28+ mix driving. Unfortunately I did not have the smarts to check the gas mileage before changing any parts. It could be me not consistent at fill up or different pumps used (but it can't be that big of a difference).
Can a bad O2 sensor cause such a drastic decrease in fuel mileage?