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Car Forum / Subaru Cars / May 2008Winter Fuel vs Summer Fuel
Last fall my '99 OBW seemed to suddenly suffer a gas mileage drop. At the time I though it might be the switch to winter fuel, and my feelings were more or less confirmed when I got a tank of apparent summer fuel a month or so ago. In the winter, generally 300-325 miles per tank. Now, closer to 380-400. (I don't count tanks where I was driving on snowy roads) Do I have a bad sensor or something? -John O On May 8, 11:33 am, "John O" <johnospama...@lottaspamheathkit.com> wrote: > Last fall my '99 OBW seemed to suddenly suffer a gas mileage drop. At the > time I though it might be the switch to winter fuel, and my feelings were [quoted text clipped - 7 lines] > > -John O Yes, there is winter gas and summer gas. Here in upstate NY the mileage difference was very noticeable. Be ready to lose a few MPG when the only gas avail. has 10% ethanol. Dave <spamTHISbrp@yahoo.com> wrote : >> Last fall my '99 OBW seemed to suddenly suffer a gas mileage drop. At the >> time I though it might be the switch to winter fuel, and my feelings were [quoted text clipped - 12 lines] > > Be ready to lose a few MPG when the only gas avail. has 10% ethanol. Hmm, I use E10 all the time and my fuel economy is also worse in winter time. I think there is more to it than just the make up of the gas you are using: - winter tires have higher rolling resistance - cold air is denser - more drag - cold bearings waste more power - etc...  SignatureDominic Richens | knob@storm.ca "If you're not *outraged*, you're not paying attention!" On Thu, 8 May 2008 14:17:43 -0400, "Dominic Richens" <knob@storm.ca> >Hmm, I use E10 all the time and my fuel economy is also worse in winter >time. I think there is more to it than just the make up of the gas you are [quoted text clipped - 3 lines] >- cold bearings waste more power >- etc... True! As well as a longer (w/ richer mixture) warmup time, and an overall richer mixture due to the denser cold air. On the other hand, you'd see summer and winter economy improve with 100% gas! Check the published mileage on E85 vehicles. Two different numbers are published. The folks who still get winter blends see twice the shock as those of us who get E10 year-round. it has everything to do with the seasons. If you are old enough to remember carb engines..v8s used to shoot up to where the most conservative subaru ej is now for mileage. A carbed suby is an unwritten world record for the same phenomona. It levels off at solstice, then slowly but surely goes back down...regardless of temps it seems. could talk to God about it, but maybe fuel injection experts can babble their non-precise failure better than the carbs that do not, as they never will need to..... 10% ethanol? who gives a fast burnin kaka.. its only a smaller bang and a quicker burning top end failure. four bangers don't need a full bang anyway. Just add a japanese kamikaze turbo. There, all fixed. > <spamTHISbrp@yahoo.com> wrote : >>> Last fall my '99 OBW seemed to suddenly suffer a gas mileage drop. At [quoted text clipped - 23 lines] > - cold bearings waste more power > - etc... lost 4 to 6 miles to a gallon on winter fuel. Summer fuel is back and mileage is back to normal now. >Yes, there is winter gas and summer gas. Here in upstate NY the >mileage difference was very noticeable. Same here in CT. >Be ready to lose a few MPG when the only gas avail. has 10% ethanol. We already do, all year around. 8^( |
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