Stop wasting money on gas!This viral guide reveals free science-backed hacks to slash fuel costs by 15%—no upgrades needed. Learn why your ‘lead foot’ drains your wallet, how underinflated tires secretly rob your MPG, and when AC actually beats rolled-down windows (shocking!). Packed with a DIY-friendly table and myth-busting tips, it’s your ultimate cheat sheet to outsmart the pump. Tag your gas-guzzling bestie—they’ll thank you later!