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2IS MPG Threads (MERGED master thread)
Driver
Joined: May 2010
Posts: 126
Likes: 2
From: TX
I do use the digital read out to gauge my mpg, but it is off by 2 mpg, give or take, very often. I find that it depends if I start off very high, around 29 mpg, then drive a bit harder, it'll dip slowly, whereas if you start low, around 22 mpg, and drive easy, it'll raise to around 26-27 mpg, but in the end, get approximately the same miles per tank. But in the end, your total miles between fill-ups is the best gauge. I've gone as low as 320 miles per tank (about 20 mpg), to now 420 miles (about 26 mpg) per tank. I fill my tank and do not top it off, and use those gallons to calculate my mpg. I typically get 16 gallons when I fill up. The most I have ever filled was 16.5 gallons , meaning I have about a gallon left. The most miles I have ever gotten out of a tank was 445 miles, about 27 mpg.
I mostly drive highway now for work, 70-80 miles a day, driving anywhere between 65/70 to 70/75 mph.
I find at times, driving quick in traffic while keeping it on ECT Power, keeps the mpg close to driving normal and just cruising. Power mode is good for rapid acceleration/deceleration, and in terms of mpg, will keep it close to cruising at nominal speeds. Accelerating at high gears is inefficient. Mpg is a trade-off between good miles and good acceleration.
I mostly drive highway now for work, 70-80 miles a day, driving anywhere between 65/70 to 70/75 mph.
I find at times, driving quick in traffic while keeping it on ECT Power, keeps the mpg close to driving normal and just cruising. Power mode is good for rapid acceleration/deceleration, and in terms of mpg, will keep it close to cruising at nominal speeds. Accelerating at high gears is inefficient. Mpg is a trade-off between good miles and good acceleration.
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you're either doing something very very wrong, or something is very wrong with your car.
(air filter, spark plugs, something...)
I've never gotten less than 16-18 out of a tank and that was all really bad city driving... my lifetime average is more like 23 or 24 I think.
The computer in the car says "Tank Average 22.4". But when I calculate it by using the odometer reading and number of gallons to fill up the tank I get 20.96 mpg. This is the second tank of gas for a new 2011 IS 250 with the upgraded 18" wheels...
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Joined: Nov 2008
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