Diesel Bombers - oil delimma

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- - oil delimma (https://www.dieselbombers.com/5-9-liter-cr-dodge-cummins-03-07/119841-oil-delimma.html)

oznation

03-14-2014 09:13 AM

oil delimma

ok so its not your normal should I go synthetic or stay conventional or what brands best kid of thing. I bought my 03 5.9l used and it now has 88k miles on it and is time for its oil change. Well the dealer sticker says syn on it, but I would like to just use conventional. Is there a way to test if its synthetic or not? I have heard once you go synthetic you cant go back to conventional. Im just wanting advice on which way to go. Thanks

steved

03-21-2014 12:06 PM

Run whatever you want, it won't cause leaks. I swapped back and forth several times and never had a leak...traded it off with 275k and not a drip.

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The leak thing comes from a synthetic removing deposits that in turn causes leaks. Diesel rated oils have so much detergent even in the conventional oils, its not a problem.

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