Working on my 1987 Toyota 4Runner with a 22RE. These engines have pretty low oil pressure at idle so in the summer I run a xW-40 or xW-50. I've been burning some oil lately....about a quart per 500 miles. It is a pleasure vehicle so it only gets driven maybe 3k miles per year. Plenty of highway miles mixed in.
The tailpipe is sooty so I think the oil rings are a bit coked up. No smoke at start up so I don't think it is the valve guides no matter how long it sits. I plan to do a B12 soak but I'm looking for a good cleaning oil that comes in a -40 or -50 to help the rings stay clean. Any thoughts?
VRP is an obvious answer but 5W-30 is as thick as it gets. HPL does a great job but that is probably overkill for the 22RE.
Any off the shelf -40 or -50 oils that are good at cleaning? Or just go with a diesel oil and maybe add a bottle of Rislone for the esters? Thoughts?
For the record the engine is sludge free. Pretty clean under the valve cover. So if anything I'm mostly just concerned with cleaning the rings and keeping them clean.
The tailpipe is sooty so I think the oil rings are a bit coked up. No smoke at start up so I don't think it is the valve guides no matter how long it sits. I plan to do a B12 soak but I'm looking for a good cleaning oil that comes in a -40 or -50 to help the rings stay clean. Any thoughts?
VRP is an obvious answer but 5W-30 is as thick as it gets. HPL does a great job but that is probably overkill for the 22RE.
Any off the shelf -40 or -50 oils that are good at cleaning? Or just go with a diesel oil and maybe add a bottle of Rislone for the esters? Thoughts?
For the record the engine is sludge free. Pretty clean under the valve cover. So if anything I'm mostly just concerned with cleaning the rings and keeping them clean.