Originally Posted By: jshaw
I have never used Pennzoil products personally, but I had planned to try PP in my wife's car next OC, based on how it is praised on BITOG. I have done some reading on other forums and there are a lot of posts that say similar things about Pennzoil and wax/sludge. PP and YB show good UOA's, but surely ALL those people that don't like pennzoil are not cazy. Is it at all possible that both sides may be partially right. Could certain brands of oil be more likely to leave deposits in certain engines with those deposits not adversely effecting engine performance through the normal life of an engine? Would small amounts of deposits ever be noticed unless an engine was disassembled to some degree?
I started driving in 1960. Auto motives have been a life long hobby. 45 years worth. I restored cars for over 20 years. Frame up jobs,with all work done by me. I have dissembled more engines than I care to remember. I have won 30 best in shows and 2 best in shows on the national level. Have worked in dealer ships 3 times between manufacturing jobs. Have been a manufacturing manager for a tier 1 GM supplier.
In the above post I said that I used Pennzoil from 1965 to 1987. I think that with my automotive back ground that I would know sludge. These are old wives tales or urban legends. Most of these tales came from neglect, not changing oil regularly, gaskets leaking antifreeze, or PVC systems being stopped up. And under these conditions any oil will sludge up. You have people on this forum with much greater knowledge than I have that will dispute all these sludge claims, some with practical experience and some who work, worked in the petroleum industry. If you can't reach a solution on this then just use something else. All the major brands are good in today's market.
Have a very pleasant evening,
Don