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OK J, maybe I should have asked the real question on my mind more directly than my post the other day. What are YOUR credentials as either an oil and lubricants engineer, or a metaluurgist that allow you to have all this information on the intricacies of oil and it's ability to protect an engine? Is this stuff you have just read somewhere, or have you actually in your personal experience torn down engines that were run on inferior grade lubricants and been able to document actual damage to engine parts? In other words,how much of this oil gibberish is just that,gibberish, and how much of what you publish is fact that can be backed up with measured parts and correlation to a specific oil and engine? Why would the engineers at not just SAab, but all the other manufacturers say one thing, when you seem to have facts that contradict them. And perhaps you can objectively answer the queston I was asking the other day at the same time. CArs do not last forever. Nothing does. Modern technology has made the internal reciprocating parts of even some very average engines far outlast the other components in the same car. OS please do not take this as offensive, just try to explain why a very slight improvement in the "theoretical" life span of an already superior engine will be significant to many people when most tend to trade their cars with between 80- 150K miles,and during that time,very few mechanical failures tend to occur. jusat think about it before responding. Challenge your own assumptions this time. Is all this small detail about tiny differences really significant in the overall life of a car or it's engine? If so, maybe you can enlighten me as to how it does matter. when I had the engine oil changed in my airplane,every change hada sample sent out foranalysis. Every oil filter was cut open in the shop to carefully examine it for any evidence of metal shavings. This is done because typical aviation engines are fairly crude comapred to modern auto engines, and the service conditions and temperature variations tend to cause a lot of cracking in critical jucntions where the temperatures vary, like the exhaust flanges of the air cooled cylinders. The fact is that automotive engines are far more toerant of these conditons than other types, and the minute differences between the types of oil you talk about are really insignificant in the big picture. That is,unless you have actually found through your own direct experience that there are differences in the real world. Are you up to the challenge of showing your cards? Academics can write papers on what performs better on paper or in the lab. I'm not interested in that.I would like to know how you have experienced this difference in oils in your own cars, and how many of your engines you have had torn down and measured objectively to document which oil really worked best. That is how an engineer would thing this out( and yes,I am). How did you figure this oil thing out?
posted by 24.128.54...
, Thu, 3 Apr 2003 10:21:43
, Thu, 3 Apr 2003 10:16:25
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