best oil

[Don87]

I use 10w-30

 

[eastexan]

The owners manual for my German diesel engine says to use only HD30 oil, so I'm using Mobil Delvac 1630.

I figure since they built it, they would know the best oil to use in it.

 

[hartwick]

I bought rotella t6 5/40 at walmart . thanks for all the good advice:thumbsup:

 

[20 20]

its a small town had my place there for 25 years. its a great town. I am by gulf road up the road from the vets club

:thumbsup:

 

[s78wingrider]

Not another oil war! Rotella T 15w40 Use in everything from Atv, motorcycle, truck and tractor.

:thumbsup:

 

[wrenchturner]

I use straight weight 30 or 4O oil unless it is a synthetic. Why do you think the manufacturers recommend straight weight 40 or 30 oil unless the starting temps are very cold? The additives in oil that make it a multi viscosity oil can cause the piston rings to stick in the ring grooves. Of course this occurs after many hundreds if not thousands of hours of operation so the effects are not short term; like smoking I suppose.

Also, I look for a CI rated oil since the ZDDP is higher. I have used practically all of my Rotella CI oil so the next trip for oil will be to a CAT dealer for off road diesel engine oil.

The bottom line is this: Any oil is better than no oil.