Quote:
M1 EP is one of my favorite well-engineered oils, yet for that vehicle, I'd go for any name-brand full synthetic HIGH MILEAGE motor oil 5w30.
Or, drop in half a bottle of Liqui Moly Motor Oil Saver to keep those old seals supple and stick to a non-high-mileage oil like you're doing.
Seals aren't immortal.
Please nobody ever do what this person suggested.
Toyota engines are long-lasting as long as you put in the crank-case what the engine needs - oil.
High Mileage additive packages, and non-brand additives will destroy your engine with time.