Quote:
Originally Posted by tanque55
Well after I posted this I did a search, should of done it before posting I know, but I am still a little confused. I was reading a post (actually a lecture on oil, oil 101, oil 102 ect....
Conclusion being that most engine wear occurs at start up and using the 0 and 5 -30 will protect the car as good as the higher 40s and 50s as most have the same protection at operating tempatures. The lower number supposedly flowing better at start up. I guess the old notion higher viscosity protects better is not always correct.
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Modern engines have much tighter clearances than old engines. This changes the whole game.
I recently carried out a study on start up wear to support the development of our IMS Solution. The test engine was started and stopped 5,200 times in the crazy July heat that we recently had to endure. I have received the results of this study and will carry out the same study in the winter at LN Engineering in Illinois where it gets way colder than here in Georgia. The same oil, engine and car will be used for both studies.
The results of the 5,200 starts in the hot climate were amazing before and after.
I leave on a 6,000 mile R&D trip in that car tomorrow :-)
The oil used for the studies is our DT40, its all we use... Nothing else.
The results of the studies will be published in my M96 Engine Bible.