I don't believe in additives. I believe in preventive maintenance![]()
i put in pre-drain treatment when doing my engine oil, and your usual $6 injector cleaner every once in a while, but nothing too special. the pre-oil change treatment though i recommend on any car. used to work at goodyear and sears auto, we charged like $20 to do it and its only 4 or 5 bucks a bottle and 5 minutes of running the engine to do clean it out and it makes a big difference on what you drain out.