I've been trying to convince my dad to get buy me this 2004 Ford F-150 XLT with 5.4L V8. I really like this truck because the 5.4 produces 300 HP and my crush really likes F-150s. The reason my dad won't buy is because it gets 13 city and 16 highway. So i was wondering if acetone really does increase gas mileage and also without harming the engine. SERIOUS ANSWERS ONLY Please
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