Oil for cold weather? Normal or Syn. [Archive]

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UpNorth

11-13-2002, 12:45

We recently purchased 2002 HD2500 crew cabs with the Duramax engines. What experience have others had with various oils in extremely cold weather (like in Minnesota)? Normal or Syn. What Brands?

LanduytG

11-13-2002, 13:20

Amsoil 5W-30 Heavy Duty Diesel or the Amsoil 15W-40 Diesel and Marine.
Greg

Kennedy

11-13-2002, 14:50

Synthetic all the way. Better starting, AND better protection in extreme heat like turbo bearings!

Amianthus

11-13-2002, 14:58

I must absolutely agree. Synthetic is a must have.

UpNorth

11-13-2002, 17:33

How many miles are you running between changes with the Syn Oil? We normally put on 3-4,000 per month.

LanduytG

11-13-2002, 17:53

Drain intervals is always a hot question. I have Duramax customers with over 50K on the oil and they are doing oil analysis every 10K. A couple of these guys are towing every day too.
Greg

Kennedy

11-13-2002, 18:41

You will have to sample your oil to tell. Conventional spectro analysis can be a bit misleading. I'd run 4k and have AV Lube do a ferrography. I kinda doubt it will suggest continuing. I ran 10k on one dump, but now will not go past 4k...

UpNorth

11-13-2002, 18:51

Kennedy ? Are running oil or syn.?

LanduytG

11-13-2002, 19:50

But every truck is not the same.
Greg