I would just run a synthetic with good Ester content and keep the oil changes to 4-5k.
redline has Been mentioned, the M1 high mileage oils are high in AN content which Has a lot of cleaning power. M1 0w40 has a good dose of esters and has cleaning claims. I wouldn’t bother with harsh solvent treatments. But the BG product he got will probably do a great job.
redline has Been mentioned, the M1 high mileage oils are high in AN content which Has a lot of cleaning power. M1 0w40 has a good dose of esters and has cleaning claims. I wouldn’t bother with harsh solvent treatments. But the BG product he got will probably do a great job.