I have a 1987 Toyota 4Runner with the 22RE. 4Runner has 98k miles, miles on the 22RE are unknown. I got it 25 years ago for dirt cheap since it needed body work and an engine as the head gasket let go and went full milk-shake. Put a junkyard engine in it.... I was 18 at the time and don't remember the mileage, probably at least 150k plus at this point. Maybe more.
I've always maintained it well with frequent synthetic oil changes but it has only been driven about 20k miles in the past 25 years, sitting for years at a time. I'm back to driving it regularly and it burns oil, as it always has. About a quart per 1k miles and the oil turns dark very quick. Not a scientific measure of the oil but it looks like it is overdue for an oil change at 1k miles.
99% sure its the rings. The oil rings are either stuck/coked up or the cylinders are worn. It runs great btw! Zero smoke at start up no matter how long it sits so I don't think it is valve guides.
So long story short....which HPL oil would be the best at cleaning? I know there is difference in Esters, AN's, PAO, etc. formulations for their different lines. Does one have the potential to clean better than another?
For example Supercar is waaaaaaaaay overkill for this engine, but if by nature its formulation has a tendency to clean a bit faster....I'll try it. Any thoughts?
I've always maintained it well with frequent synthetic oil changes but it has only been driven about 20k miles in the past 25 years, sitting for years at a time. I'm back to driving it regularly and it burns oil, as it always has. About a quart per 1k miles and the oil turns dark very quick. Not a scientific measure of the oil but it looks like it is overdue for an oil change at 1k miles.
99% sure its the rings. The oil rings are either stuck/coked up or the cylinders are worn. It runs great btw! Zero smoke at start up no matter how long it sits so I don't think it is valve guides.
- Did a 4 day B12 piston soak. The B12 drained into the crankcase very quickly. Kept adding B12 over couple of hours over 4 days. Not much change.
- Ran a can of BG EPR right before an oil change. Not much change though the oil came out looking like ink.
- Currently running a bottle of Rislone with the current oil change, just for fun.
So long story short....which HPL oil would be the best at cleaning? I know there is difference in Esters, AN's, PAO, etc. formulations for their different lines. Does one have the potential to clean better than another?
For example Supercar is waaaaaaaaay overkill for this engine, but if by nature its formulation has a tendency to clean a bit faster....I'll try it. Any thoughts?