synthetic oil

[Bruce Edwards]

First off a jet is a sealed system. It is not open to contamination as in an internal combustion engine. I do agree that the oil does not break down it is the contamination due to the combustion process that is the problem and that is kind of the point I was looking to make.
The problem I have with synthetics is the cost and oil change intervals. The problem with an internal combustion is it is a dirty system. The rings leak hot gases, fuel, water gets in during cooling due to condensation and more. All of these factors cause a break down in the oils ability to lube the engine. After a time the oil can not hold any more crap and starts to deposit the heavier material in low spots in the engine. Know as sludge to some of us.
The amount of contamination any one product can hold may be up for debate how ever all will reach a saturation point. My big problem with synthetics is that I do not see a cost benefit from it's use in any way. I would rather change my oil at $20.00 or less every 3,000 to be sure I am draining out as much crap as I can rather than hope that the synthetic will hold all of those not good for the moving parts contaminates till they say it is due. The acid that comes from all of that stuff mixed in the oil going after the soft bearing material just ever seemed like a good idea to me.
Just for the record I have a 93 Bonnie SSEI with a 3800 that is Supercharged with 150,000. I change the oil every 3,000 and it comes pretty clean looking also. Does not use oil or leak. Never had to open it up. Have had to repair the supercharger twice but the rest has never been touched.
Or maybe I should tell you about my 73 Charger with the 340-6 that I would bang off of 8,000 at the track and also drove to work every day that also never had any dirty oil. I could pull a cover after 24,000 and it just as clean as the day I built it.
Again back to my original post. Show me a side by side then I will believe till then......