Posted by Texasmark1 on June 30, 2013 at 16:31:33 from (184.20.63.40):
In Reply to: Cummins 8.3 oil posted by Jackers Donk on June 30, 2013 at 05:36:20:
The sunburst certificate on the container tells you the application. Compression engines are rated with a C; like C4. Spark fired engines are rated with an S; like SJ.
Some oils like the heavy duty oils as mentioned above, ROT, Delo, Delvac, carry both ratings like C4/SJ.
Lot of people out there that don't have a clue as to what they are talking about. Others quote something from hearsay without the faintest as to the facts behind it, even if it's true.
Find a 10W-30 with the C rating!!!!!!!!!! Beware of "light duty" pickup diesel applications. What is the rating in the Sun?
Read the container.
If you want some real oil to put in your Cummins get the ROT 5W-40 full Syn. WW has it and the price isn't too bad. I bought a new tractor with a 3.3L Cummins and called them. They said my little baby would "love" to have that oil in it.......oh it's C rated, all weather. I run mine the 300 hour recommended change interval and it's still honey colored when I change it.
But it's your equip, your money, your potential head ache, and your call. Good luck.
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