I bought this car from a used car lot at 75,000 miles. I've had it since November 2024, and in February it started acting up. We replaced the spark plugs, the coil packs, the sensors, everything we could think of. Finally had the money to take it to the mechanic in May this year, all for them to tell us it's a blown head gasket, and that I need a new engine, at 78,000 miles...