Hey folks,
We have a 2012 GT that has been getting highly inconsistent mileage for the past several months (no CEL). When we purchased it new, we were getting ~27mpg. Today we have 36k on it and are ranging between 20.5 and 26mpg on a 80hwy/20city commute (no variables: we don't have any extra weight in the car, and we travel the same highway 75 miles round trip 5 days per week).
When I first noticed the drop, I checked the tire pressure and air filter - all was well. Regular, full synth oil changes every 7k as well. I ended up changing the air filter and ran a bottle of Castrol Syntec through a tank and saw no change. I brought it to our dealership and they drove it and stated it felt totally normal. IMO, the transmission does not feel the way it used to. I feel it prematurely shifts up to 5th, sometimes at speeds ~35-40mph. The service manager informed me that there would be a CEL if anything was out of spec. I just can't fathom why we'd get 20mpg one week, 23 another and every blue moon, 26mpg with no change in commute or driving style. Any info is appreciated.
We have a 2012 GT that has been getting highly inconsistent mileage for the past several months (no CEL). When we purchased it new, we were getting ~27mpg. Today we have 36k on it and are ranging between 20.5 and 26mpg on a 80hwy/20city commute (no variables: we don't have any extra weight in the car, and we travel the same highway 75 miles round trip 5 days per week).
When I first noticed the drop, I checked the tire pressure and air filter - all was well. Regular, full synth oil changes every 7k as well. I ended up changing the air filter and ran a bottle of Castrol Syntec through a tank and saw no change. I brought it to our dealership and they drove it and stated it felt totally normal. IMO, the transmission does not feel the way it used to. I feel it prematurely shifts up to 5th, sometimes at speeds ~35-40mph. The service manager informed me that there would be a CEL if anything was out of spec. I just can't fathom why we'd get 20mpg one week, 23 another and every blue moon, 26mpg with no change in commute or driving style. Any info is appreciated.