Re: Starting the year??????

Posted by PackardV8 On 2011/4/11 7:52:20

I've noticed over many years and a variety of different engine applications that some engines tend to have engine oil that remains very clean and clear-amber looking for a very long time. Maybe only about 20% of engines i've had in my own possession for long periods of time are that way.

While other engines the oil gets rather dirty looking first time i start it rite after an oil change. There seems to be no ryhme or reason to it.

Example:
My 56 Executive will have dirty looking oil directly after an oil change and first start up. This engine is one that i have had oil pan removed at least a dozen times over the last 7 to 8 years not to mention longitudunal main oil galleries closely inspected and they were clean and heads removed all at the same time at one time when i got the car. Bottom line: this is a very clean engine inside and was fairly clean when i first got it at 34K miles.

I've never really understood why some engines dirty the oil so fast while maybe 20% of others will go a long time with oil that remains very clean. However the engines that dirty the oil real fast seen to be oil consumers while the engines that use no oil at all tend to keep the oil very clean for a long time. Must be due to rings whether good/acceptable compression tests or not.