Engines warmed up to operating temperature, then started to cruise at 3200 rpms. went for a few miles then the oil pressure gauge started bouncing around, then settles back down. I assume the previous owner followed the dipstick as well over filling.
If so, does it build up carbon on the...
I completely drained the oil and changed the filter. I put in 7 quart and started the engine. I only let it run long enough to register oil pressure. Let rest for 5 minutes, dip stick showed almost 2 quarts low. I added another quart and rechecked. One quart low, added the 9th quart to bring...