Quote:
Originally Posted by Dave
on a turbo its practically free
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Not if you actually use the turbo. More air (what a turbo does) requires more fuel. There is no getting around that. One of the car magazines did a super group comparison test issue where they had 3 sets of group tests. To give you an idea of the cars involved the top group included a BMW M5 (V8), the mid group had an M3 (V6) and the bottom group had a Neon SRT-4. The worst observed mileage they recorded out of all the cars (7 or 8 total) was from the 2.4 liter turbo Neon.
Turbo cars do well in the EPA's test cycle because it doesn't require using the turbo much. When driven hard they don't do as well.