synthetic oil is best?

When on the odometer can one switch from petrol oil to synthetic oil?

And which synthetic is best for a 2004.5 CTD?

Can you ever switch back to petrol based oil once you've run synthetic?

Also, how does the oil change schedule change if you're running synthetic?

Thanks in advance!

DT.

 

Where you live you could probably run Dino all year long. Heck, I live in Alberta and usually run 15W40 all year.
My advice? Use Rotella with Stratapores and change on a regular basis.

 

Sorry about the confusing post- my answers are in bold.

 

I believe Dodge says to run dino oil for the first 10,000 miles, and then you are 'ok' to switch over to synthetics.

I am currently in the process of changing everything over to Amsoil synthetic, from the motor oil to the axles, tcase, etc.........

 

20,000 mi.,Amsoil, every 15,000-25,000 mi., no need to revert back!