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Old 06-16-2012, 11:25 PM   #57
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Kathryn's Avatar
Join Date: Apr 2012
Location: Orlando, FL
Posts: 636
Originally Posted by Jon Mopar View Post
<< this guy works for Chrysler Corp, and was also technician with them for some time. Of course, one the engines I saw on a regular basis was the Cummins. Do I think you should go 20k+ miles or several years between O/Cs?? NOPE! I agree that motor oil is more advanced now than before, but 7500 miles is around the most one should put on their engine between O/Cs in my educated opinion. In fact, with extended service Diesel vehicles, we recommend the O/Cs be done every 7500 or less. If anyone ever told you 20k+ was perfectly acceptable, it may be because they'd like to see you with bigger problems later on down the road.

Oil has a life span. No that's not a wives tale, it's not like the oil was years ago. Today's oil has detergents and additives that break down and separate with age. Factors like continuous temperature changes, condensation (over extended periods of time) among others will all compromise the oil's integrity. Will driving 20k or 4-5yrs between O/Cs kill your engine?? No....not quickly. But I promise, that engine isn't going to look as nice inside or perform as well after 300-400k as one that was babied, with O/Cs every 5-7k. Just my 2cents

Don't be cheap, change your oil. It's literally the only nice thing you can do for your engine that really can help extend life and improve economy etc.
Thanks for the info! I always knew it was good to change your oil, but never quite understood why ... now I know, and will be even more diligent.


Kathryn . . . still lurking and learning!

"Wise men still seek Him..."
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