[Por_sha911]

I know that some folks have good experiences with 'motor repair in a can' products. 50 years ago there used to be a product for bad rings but all it had was a bunch of thickeners. Great for compression but clogged up all the oil passages. Kind of like radiator stop leak. Works for the radiator but clogs the cooling ability in the block.

Marvel Mystery Oil or Seafoam does work but you've got to run it for a short time and then IMP do 2 oil changes. One right away and then another in 500 or 1000 miles to be sure it is out of the system. I have read where some feel that when you 'clean' the motor you are loosening up gunk that can then get trapped in other places. I guess at this point the OP doesn't have anything to lose to try it.