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Message: <blockquote data-quote="skidsteer.ca" data-source="post: 14912" data-attributes="member: 307">I have a 3500 series ram pickup with a pyro meter. It is surprizing how quick the guage drops when you get your foot off the throttle. But i thinK the most important thing is a minimum 1 minute cool down for a  engine that was lightly loaded in the last few minutes of operation. if it was loaded heavy, a 5 minute cool down is more in order. This gives the heat time to transfer from the inside to out.I'M sure sythetics offer better protection, but so does proper use. This is one reason I have stayed away from turbos on my rental machines, the plug the exhaust thing is the other. Don't get me wrong I love turbos for the broad power curve, but they are not something that should be used by the uninformed.It would be interesting to see how several engines with pre lube systems lasted compared to ones without it, just that it not easy to get real world comparisons.Ken</blockquote>