Kenneth3aracing Posted August 10, 2015 Share Posted August 10, 2015 I owned my 3.0R less than a year with 130k. I filled up a full tank and the display shows me 220 miles to go and drop to 210 miles after I drove in city about 10mins. Is it a good number for a car with 17 gallon tank size? I feel disappointed when I compare my scion xb which can do 240 miles with 14 gallon 87 gas. Is this number normal to 3.0 engine Subaru cars? Well I know the ride quality is better but the gas efficiency seems not so successful. Link to comment Share on other sites More sharing options...
orndog Posted August 10, 2015 Share Posted August 10, 2015 Cars101 says your MPG is 17/24, which works out to 287 miles city on a full tank, throw in the conservative nature of estimated miles left displayed and you might still be a little short. Check maintenance history. Do the plugs again anyway - the driver side back plug is notoriously difficult and I've seen shops skip it. Link to comment Share on other sites More sharing options...
theflystyle Posted August 13, 2015 Share Posted August 13, 2015 Thats short. I get about 22 with my heavy footed driving with 50/50 city and hwy. +1 above and clean air filter, MAF sensor and make sure to run premium fuel as its required. Link to comment Share on other sites More sharing options...
legacyshawn Posted August 13, 2015 Share Posted August 13, 2015 +2 haha Also, it would make sense to run better tune and have the TCU tuned to lock up quicker and shift quicker by bumping up the trans oil pressures. It does help since they designed the transmission so smooth like as if it's a CVT... ITS NOT and its just throwing usable power and fuel away. Link to comment Share on other sites More sharing options...
Kenneth3aracing Posted August 13, 2015 Author Share Posted August 13, 2015 Appreciate the suggestions. I went to the shop and the tech suggests me to do the measurement on gas usage by recording gallons of gas I refilled and mileage(odometer) I drove until the gas empty orange light is on. As I mention, how come a full tank only show 220 miles to go??? Not sure some hidden gallons by the display error? I will update the test result later this week. Link to comment Share on other sites More sharing options...
Kenneth3aracing Posted August 19, 2015 Author Share Posted August 19, 2015 After the measurement, I drove 191 miles from the full gas to the gas light on and 13.5 gallon gas filled up to full level again. Wo ... it is 14mpg with my 60% local and 40% highway. Car already has 130k mileage and I use 91 gas. Link to comment Share on other sites More sharing options...
legacyshawn Posted August 20, 2015 Share Posted August 20, 2015 Something's gotta be wrong. 14mpg? Check PCV, oil,, tires pressures, check for pads binding, put the car on lifts and check for drivetrain binding. Try cleaning MAF sensor and may need a new O2 sensors. Point is, even if you were flooring it from traffic light to traffic light then cruising on the highway you should be getting more like 20 mpg. You don't live at high elevation do you? Link to comment Share on other sites More sharing options...
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