My Toyota 2.7L 1AR engine uses a lot of oil. Like a quart per 500 miles or worse. It runs very well, is smooth, and gets good mileage. I know this engine has the issue with low-tension piston rings so I've assumed this is consumption past the rings but I suppose I can't rule out valve stem seals.
I'm already running 5 or 10w-30 rather than 0w-20. Is it worth trying an additive to slow consumption rate? Any improvement would be nice.
I'm already running 5 or 10w-30 rather than 0w-20. Is it worth trying an additive to slow consumption rate? Any improvement would be nice.