kmpdx Posted June 24, 2017 Share Posted June 24, 2017 Hi Guys. I just drove my 1991 Loyale from Portland to Ashland. I tracked my mileage and it seems that I got about 20.44/gal. There is quite a bit of uphill driving south of Roseburg but that still seems a little low. The car runs ok and I don't have any obvious signs of a problem. What do you guys think? . 1 Link to comment Share on other sites More sharing options...
Dee2 Posted June 24, 2017 Share Posted June 24, 2017 Replacing the oxygen sensor can help improve mpg. Also, check your plugs and make sure they are clean and sharpened flat. 1 Link to comment Share on other sites More sharing options...
Len Dawg Posted June 24, 2017 Share Posted June 24, 2017 I second Dee2, plus loaded vehicle weight? Running A/C or heater in general?Tire pressure? ARCO gasoline? 1993 loyale 4wd 5spd wgn ea82 I noticed my milage is going back up coming out of winter... I was averaging 240mi right before E with 2 gallons left in the tank this last winter. Without heater on I'm going back up to close to 270mi +/- max I ever got was 333 miles when the light came on to fill up. 1 Link to comment Share on other sites More sharing options...
kmpdx Posted June 25, 2017 Author Share Posted June 25, 2017 So it turns out that the AC condenser was running due to what I believe to be a switch that never fully turns the AC off. That will actually be another post. I am going to replace the O2 sensor and see what what happens. I did actually get better mileage with the AC disconnected on the trip back up to Portland. Honestly, my numbers look to be about the same as Lendawg's. If there is any change after O2 sensor I will post. Thanks! 1 Link to comment Share on other sites More sharing options...
kmpdx Posted July 2, 2017 Author Share Posted July 2, 2017 (edited) So it looks like I was doing my calculations wrong. I was dividing the mileage usong 15.9 gal instead of the 12.5-13 gal that the tank is actually taking on fills when showing empty. Getting ~27 mpg or better. Thanks! Edited July 2, 2017 by kmpdx Link to comment Share on other sites More sharing options...
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