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Originally Posted by Randy Rosenberg
Interesting... I was told that oil vapors contain a specific acid that if not positively evacuated from the engine could condense and re-enter the oil; I was told that these acids will lead to early bearing wear, and that it's better to burn them (PCV) than attempt to evacuate them to atmosphere. I was told that if one does not run a PCV, then one ought to change oil frequently (like 500 to 1000 miles).
I didn't "google" this to see if there's validity to it...
Any thoughts or comments? |
I have no idea Randy. Though, that's news to me. The byproducts of combustion is mostly water and CO2, with CO, some oxides of nitrogen, and assorted trace elements...as well as unburned fuel vapor. But Acids? Beats me. Keeping water and fuel out of the crankcase is a true benefit. If you have an engine that pulls reasonable vacuum, is built tight and doesn't produce blowby, and doesn't run a power adder...then PCV is a good thing provided it doesn't pull oil into the intake. But, it takes a lot of fuel vapor to contaminate 11qts of oil; and keeping the crankcase ventilated to atmosphere is good enough mitigation for water vapor most of the time. Additionally, most cobra guys drive the cars less than 2K miles/year...so how much benefit can it be.
