Saabstory
.:R32 OG Member # 002
How will a tune that increases hp and tq use less fuel?
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Most tunes improve fuel economy when driven the same way. Tunes basically work by improving engine efficiency; so if you drive the car normally then it is running more efficient and therefore gets better economy.
Most people don't specifically see this result as they also have more power and drive it more aggressively; but the improvement is there if they want to.