I've got 70k on my 02 diesel and was thinking about going full syn. oil. Is there a good or bad time to do this? I've heard with a gas motor it's not a good thing to do with high miles. Is there any kind of limitations like this with a diesel? I've used rotella t the whole time.

 

This is just my opinion, stealth, but if that 70K has been trouble-free, and the engine still seems strong - stay with the Rotella T.

My son has a saying "RotellaT for my PSD." He's got over 300K - no joke - and drives it like a borrowed mule.

 

When I got my truck it had 68K on the clock and my first oil change I went to Rotella syn... Have never looked back, I also use in my Oliver tractor and my mowers, no problems. I have a 01 7.3 PSD..

 

I've been using Case/IH motor oil in everything from pickups to combines to semi's for years and have had no problems. One thing I have learned over the years is - if it isn't broke don't fix it. If what you are using is working well don't change. The worst thing a person could do is switch brands or types of oil all the time. For example: My 93 pickup has over 200000 miles on it with the same oil all the time with no problemsa nd other friends who own diesels ask how well the engine runs.

 

just use one that is ci-4 plus and you will be fine. stick with the regular hdeo