Quote:
Originally Posted by JasonTDude
Another thing I have been noticing for about 2 months now is my mileage has gotten very bad. To give you an example, I usually get around 18 mpg city/hwy 50/50 mixed, I get around 16 in city exclusive and 23 or so in highway. Those numbers are about 3-4 mpg under where they should be unfortunately. In city for example, I cannot get over 10-11 mpg and this is with conservative driving. Highway is more like 18-19. I always thought its because of the way gasoline is changed in cold weather so it burns faster, but I don't know if that much change can be attributed to that. This is about 25-30% or so reduction in mpg.
I'm worried that BMW may have used wrong oil last time around AND/OR me driving in extremely cold weather (unfortunately I had to do this several times this year) with old oil (10k miles). There were many instances where I drove when it was 2-3F outside.
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Low mileage could be due to cold weather, all my cars' MPG has gone down.
Switch to a shorter interval this time, but I'd wait to see what Blackstone says. Don't know how many miles on your car, but it might be worth checking spark plugs too.
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Current:
16 F82 M4 GTS, Black Sapphire/Black, DCT
08 E92 M3, Sparkling Graphite/Bamboo Beige, 6MT
07 E85 Z4M Roadster, Alpine White/Red, 6MT
99 E36 M3, Techno Violet/Dove Grey, 6MT