Engine/Transmission (1998.5 - 2002) Switch to Synthetics at 85K?

[InThinAir]

Since this has been such a cold winter and my Stock Batteries are gettin a little old, I am wondering if any harm would come from switching to a synthetic Engine oil at 85K miles? Been running rottella since the first change. Too late or ok? Also can I switch back and forth?



---Doug

 

[JBHale]

I switched to synthetic at 115000 in the engine ,no problems yet, i. e. No leaks.

 

[InThinAir]

Thanks!



How many miles have you run since you changed? I guess I am gonna go pick up some synthetic Rotella for my next change in a week or so.



---Doug

 

[RBeard]

Give Royal Purple a look-Good oil been using it for 100k

 

[JBHale]

I've had it in there for 12,000 miles now , second change already, getting all the old out deposits and such. but no problems , truck starts easier, and is a little quieter. I run Royal Purple in everything, Its what I like and trust.

 

[KIseminger]

Thin Air-

I feel your pain, I live in Dillon and it's been pretty cold up here as well (15 degrees and snowing). I switched at 55k with no problems. If you switch to 5W-30 AMSOIL you can run it year round. My truck starts sooo much better now, even unplugged. AMSOIL also makes gear lubes that help as well. I've noticed a big way just in the way it runs. Let me know if you are interested, I can help you in the purchasing dept. Initialy it's expensive, but you'll save in the long run.

-Kyle