Quote:
Originally Posted by p912guy
As far as I know, the only thing you can do is ease up on the go pedal a bit. Also, you don't mention what octane you are using. If you are using a mid-grade (90-91) vs high-grade gas, you're mileage may not be as good since timing may be retarded to prevent premature detonation. While we all would like good gas mileage, if you're running the N55 or B58, vs the N20 or B48 you've already made a decision that gas mileage is a secondary concern. I knew exactly what I was giving up and what i was getting when I switched from my MINI Cooper S which would get 38 mpg on the interstate to my BMW m235i.
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I've used seafoam in the gas tank before with no issues but I wouldn't use it anywhere else, but it would be a last effort after a month or so of driving to get the real world mileage.
I came from a 4cyl C300 so I knew it would be less but to get nearly the same at my 2016 BMW X6 with the n55 when it weighs 1/3 less is the concerning part. I do go easy on the pedal 85% of the time and I fill up with 91 because that's the highest in CA.