Jamesvinar
New member
Well here i am back at 12 mpg. Not sure why, air filter is good, O2 sensors replaced recently, oil changed and i only use what the station says is 93
Without the tune it does idle a little rough to be honest, it's about 200 short of the set RPM even with the tune, Trans was rebuilt about 10k miles ago and i made sure to do some upgrades while we were in there to make it shift faster and last longer. I wouldn't say i have any true upgrades the car, mainly small stuff to make it more efficient. I noticed that the average MPG doesn't match the range of it. GPS miles also don't equal what the odometer says.James, if your car shows 28 mpg on some highway trips I'd be thrilled.
Generally I drive mostly hwy miles and my 230,000 car still shows a 22-23 mpg average.
12 seems lower than I'd expect in all but the most extreme city type driving, but I admit, I start my car and am on the interstate in a mile.
Does your Mark idle nicely? Or have a real sloshy transmission? Do you love launching hard from stop signs? Any performance upgrades?
Hit reset again tomorrow and track the average over the next tank of gas I guess.
Oh, and if you've never changed the fuel filter go ahead and do so. I doubt its the problem but its a good maintenance item to take care of.
The fellas may be onto something with the questions. This down to 12 mpg is a new development though, right?Without the tune it does idle a little rough to be honest, it's about 200 short of the set RPM even with the tune, Trans was rebuilt about 10k miles ago and i made sure to do some upgrades while we were in there to make it shift faster and last longer. I wouldn't say i have any true upgrades the car, mainly small stuff to make it more efficient. I noticed that the average MPG doesn't match the range of it. GPS miles also don't equal what the odometer says.