It's all the bondo dust that's attached to your brain cells.4200 miles in, the truck is flawless; I love it.......... pulled the oil stick today and the level hasn't budged, kinda dirty though; it's getting a change.
I popped off the radiator cap to have a look; uh oh, someone is running straight water ......... I totally forgot to swap it out for antifreeze after I got it running. I had no idea ........ major disaster averted
Just a tip:
Oil in engine, coolant in radiator.
Even a caveman can do it.