Originally Posted by jzchen
I understand about viscosity ratings. I went to the Falex website to look up the test equipment used. Although I couldn't see a machine that looked exactly like the one they used, I found the one who's description closely matched, and found you can raise the temp. to 80 C. I don't think that is operating temperature....
Actually that is fairly close to idle temperature for most vehicles i believe, which is around 180F. During excessively hot days or very hard and fast driving temperatures can hit upwards or 240F to 260F in most engines from skimming through on BITOG (bob is the oil guy).