MPG dropping...after 4th tank, what is going on.
12-21-11, 05:50 PM
#17
I get gas at the same Chevron and this was my 4th tank. My tank mpg estimate is at 17.5 mpg currently and it has consistently been at 22mpg for the last 3 tanks. My driving habits have been the same. The wife did take it for a spin on the first 30 miles of this tank though. She must have redlined it at every signal light. I am at about 70 miles now on this tank. Should I worry or have you guys gotten mpg this low before?
12-21-11, 06:23 PM
#18
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Dang, you guys are not making me feel good about my purchase last night. I was hoping I'd be getting an average in the 20s for my soon-to-be iS350. You guys are talking averages in the 17 or 15 range. OUCH! My vette was getting over 19 average. Sheesh. 
12-21-11, 07:03 PM
#19
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Wow. I hope I am not headed in that direction. The 328i that I had before gave me 18mpg consistently in the city and I thought that was horrible. The 22mpg I was getting for the is350 in the first place gave me some hope. Oh well, the joy of driving does outweigh the mpg issue. 
12-21-11, 07:34 PM
#20
Winter fuel blend, your vehicle's MPG will take the hit regardless of vehicle. The effect is noticable at city speeds while at freeway speeds not as much depending on your driving routes/habbits.
My IS250 AWD, it dropped to about 17-18 MPG from the about 20-22 MPG which I had from my daily communite (which also includes a mountain). Now that I have the my IS 250 RWD, its currently about 20-22ish, from the 22-24+ MPG.
Since I also do drive long distance from time to time travelling from Seattle, going to Vancouver, Canada. Can tell you constant cruise control on the freeway driving about 110+ miles / 177 km distance from full tank, the needle dropped to the exact same place in both RWD/AWD cars a, which is on the 3/4 mark from full. Seems like no impact at first glance however there would be, but it's not enough to make the needle drop a bit wee bit more on the winter blend.
My IS250 AWD, it dropped to about 17-18 MPG from the about 20-22 MPG which I had from my daily communite (which also includes a mountain). Now that I have the my IS 250 RWD, its currently about 20-22ish, from the 22-24+ MPG.
Since I also do drive long distance from time to time travelling from Seattle, going to Vancouver, Canada. Can tell you constant cruise control on the freeway driving about 110+ miles / 177 km distance from full tank, the needle dropped to the exact same place in both RWD/AWD cars a, which is on the 3/4 mark from full. Seems like no impact at first glance however there would be, but it's not enough to make the needle drop a bit wee bit more on the winter blend.
Last edited by Sango; 12-21-11 at 07:41 PM.
12-21-11, 08:20 PM
#21
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12-21-11, 08:41 PM
#22
I've had my IS350 for a bit over 4 years now, and excluding a couple times I was someplace for much of a tank with bad traffic I've never been under 20 avg for a tank... usually more in the 22-24 range for typical mixed driving. I get 28-30 all highway on road trips.
Biradors post mentions a lot of causes for lower mileage...winter fuel blend is another... and one he also left out- tire inflation. This can have a couple mpg impact depending how off you are.
12-23-11, 12:16 PM
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those guys must be driving in really bad traffic (or something more significant is wrong).
I've had my IS350 for a bit over 4 years now, and excluding a couple times I was someplace for much of a tank with bad traffic I've never been under 20 avg for a tank... usually more in the 22-24 range for typical mixed driving. I get 28-30 all highway on road trips.
Biradors post mentions a lot of causes for lower mileage...winter fuel blend is another... and one he also left out- tire inflation. This can have a couple mpg impact depending how off you are.
I've had my IS350 for a bit over 4 years now, and excluding a couple times I was someplace for much of a tank with bad traffic I've never been under 20 avg for a tank... usually more in the 22-24 range for typical mixed driving. I get 28-30 all highway on road trips.
Biradors post mentions a lot of causes for lower mileage...winter fuel blend is another... and one he also left out- tire inflation. This can have a couple mpg impact depending how off you are.
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