@Requnix I live in Montana and bought a '17 Premium in June. Since then I have driven across Idaho and Nevada to CA and back. I set my top LCD in the Forester to the screen that monitors my overall and current mileage and I have been making observations on my mileage in relation to driving conditions.
I began doing this after observing mileage in the 25-26 mpg range while driving around 80 mph on the nearby interstate. On my summer trip, when I was on two lanes averaging a little over 65 mph, I could get mileage up to 33-34 mpg. (I was wondering if this is where Subaru got their window sticker epa mileage figures from). When on interstates with lower speed limits, I got 30-32 mpg driving around 74-76 mph. Back home in Montana, I discovered that if I set my cruise down around 76 mph while on the interstate (with our 80 mph speed limit), I could average over 30 mpg, sometimes up to 32. But with cruise back up at 80-83, I would be back down around 25/26 mpg. I also observed how hills and inclines could affect the mpg, but the biggest factor in my driving was wind. I live in a windy area. If I am driving 80 and the wind is strong, my mileage can plummet down to 22 mpg or even lower.
I wondered if the mileage computations the Forester is making are accurate, so, since I write down my miles and gallons when I fill up, I figured my actual mileage and found the onboard computer is about .3 to .8 mpg over the actual.
I have no idea why Requnix is experiencing such consistently lower mileage. With my '17, it seems to be all about the highway speed, incline, and wind conditions affecting my mileage. The OP needs to get some diagnostics done. Something isn't right.
I began doing this after observing mileage in the 25-26 mpg range while driving around 80 mph on the nearby interstate. On my summer trip, when I was on two lanes averaging a little over 65 mph, I could get mileage up to 33-34 mpg. (I was wondering if this is where Subaru got their window sticker epa mileage figures from). When on interstates with lower speed limits, I got 30-32 mpg driving around 74-76 mph. Back home in Montana, I discovered that if I set my cruise down around 76 mph while on the interstate (with our 80 mph speed limit), I could average over 30 mpg, sometimes up to 32. But with cruise back up at 80-83, I would be back down around 25/26 mpg. I also observed how hills and inclines could affect the mpg, but the biggest factor in my driving was wind. I live in a windy area. If I am driving 80 and the wind is strong, my mileage can plummet down to 22 mpg or even lower.
I wondered if the mileage computations the Forester is making are accurate, so, since I write down my miles and gallons when I fill up, I figured my actual mileage and found the onboard computer is about .3 to .8 mpg over the actual.
I have no idea why Requnix is experiencing such consistently lower mileage. With my '17, it seems to be all about the highway speed, incline, and wind conditions affecting my mileage. The OP needs to get some diagnostics done. Something isn't right.
