My dad swore his "engine flush" trick would save my car
Last month my car started knocking real bad, so my dad told me to dump a can of engine flush in the oil and run it for 10 minutes before changing it. I did exactly that, drove it around the block, then drained the oil. Turns out the flush loosened a ton of sludge that then clogged my oil pickup tube, and the engine seized on the highway 2 days later. Cost me $4,200 for a rebuild. Has anyone else gotten bad advice from a parent that backfired this hard?