Quote:
Originally Posted by John 070
tell this to people driving n20/n26's. They are clearly getting better fuel economy than N52s, like you said, it's not rocket science. Is it as smooth? No way. We can debate it until the sun goes down, and what we like is what we like, but the industry marches on. My grandpa says real Porsches are not liquid cooled. But the car co. didn't listen to him.
We've known for 9+ years that 335's usually get better mpgs than 328's in the real world, I've heard DI was to blame. But the end result is what it is.
edit: The EPA isn't testing cars, the car mfgs. are self reporting. The EPA years ago only tested 15% of all cars. When the F30 came out, BMW slapped a 36 highway number on it, and immediately the EPA tested one and said no, you will put 33 on the window. Because BMW is not an American co. Again, on extended loaner periods, I easily got 40 mpg hwy with a 335d, and with the '16 328, 38 on the highway. My 335i is struggling to do 30, but maybe a walnut blast may help.
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There are many reasons the N20 gets much better fuel mileage versus the N52. Eight speed transmission, direct injection, etc. Heck, the N54 can get the same mileage as the N52. If bmw kept a NA I6 around and updated it with the newest technology, I almost guarantee you it would get the same mileage as the N20. Just look at the 340i, 3.0L turbo gets within 1mpg city and 2mpg highway of the N20. Take the turbo off and it'd probably be identical to the N20.