I made the mistake of using full
synthetic oil in a Mitsubishi Eclipse from about 1,000 miles on.....the rings never did seat, it used
oil all of it's life.
I've heard that one should have 10,000 miles on a motor before attempting to switch to full
synthetic oil for just this reason.
Could be the problem.......but, if so, the issue of the two adjoining cylinders would be a bit baffling, it would seem that it would be all of them.
Keep us posted..
Cheers from Dugly
