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It's essentially the same as the official MPG figures we're given, while it might not be as surreptitious, cars ECU's are tuned to give great MPG figures on these tests, then you get them out into the real world and they're nothing like it.
Yet you can have your car chipped or reprogrammed and get better genuine MPG and more performance. It's all geared up towards passing a test, not towards driving, and these small petrol turbos seem to be very bad for it. |
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