Any feedback on high mileage oils? I bought my es300 (1997, 188,000 KM, ie 116,000 miles) and did an oil change right away (Regular 5w30 oil). its due for its change in March or so. I am not going to change to synthetic because all the service records show the previous owner has used regular oil (and always changed the oil at regular intervals of 5-8,000km but no more than 8,000 km).
However, it is an old car, and the valve cover gaskets do "sweat" a bit,but no biggie. not really losing any oil . (i guess whenever it goes for its timing belt late next year or so I'll get the valve cover gaskets replaced with the newer toyota oem ones)
i am thinking of switching to quaker state high mileage oil - now a 'high mileage oil' just 'hype' ? it does say it swells the seals , which sounds like a good thing, though i hope it doesnt mess with anything else? I am wondering if anyone here has tried it, or would suggest using it?
here is an example from my local store (i am in canada)
http://www.canadiantire.ca/AST/browse/4/Auto/3/AutoFluidsChemicals/EngineOils/PRD~0289017P/Quaker+State+High+Mileage+Motor+Oil.jsp?locale=en