Originally Posted by UG_Passat
over 100,000 miles on my current car, using high SA oil, and hasn't started to misfire, which is usually a symptom of excessive Intake Valve buildup.
The only change from my previous car, religious use of additional fuel injector cleaner with every tank (1 oz of Renewable Lube fuel injector cleaner).
That's only for excessive carbon on the piston tops, which can alter compression amongst other things (like hot spots and pre-ignition). The effects (symptoms) of excessive carbon buildup on the valves are different.
over 100,000 miles on my current car, using high SA oil, and hasn't started to misfire, which is usually a symptom of excessive Intake Valve buildup.
The only change from my previous car, religious use of additional fuel injector cleaner with every tank (1 oz of Renewable Lube fuel injector cleaner).
That's only for excessive carbon on the piston tops, which can alter compression amongst other things (like hot spots and pre-ignition). The effects (symptoms) of excessive carbon buildup on the valves are different.