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Old 08-28-2012, 05:07 PM   #9 (permalink)
ChrisSlicks
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Originally Posted by DR_ View Post
Good info. My thermostat seems to fully open a little sooner at about 196f. Also what numbers are using to come up with twice as thick at 210f? The SAE viscosity curve charts I've seen show about 15 cSt at 180f and 10.5 cSt at 210f but good synthetics should be much closer. I'm not a chemical or mechanical engineer (my wife is a CE), but I'm interested in the subject.
Sorry I misspoke. I was thinking 50% but during brain translation it come out as double, I apologize.

Yes, that is the same calculator I use for my rough analysis. You can enter specific values from manufacturer data and it gives a pretty reasonably accurate plot. Interestingly enough the difference in viscosity between conventional oil and synthetic isn't all that (statistically) significant.

I'm not an oil expert either, just have a strong interest in the subject as I would like to keep my car alive on track

I had been toying with the idea of going up a step in viscosity since I was spending so much time at elevated temperatures, but I think the real solution will just be to figure out how to improve cooling.
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