what is the really the right kind of oil for diesel engines?
15 w 40?
20 w 50
plain SAE 50 or 40?
What prompts me to ask this is yesterday's oil change project on my universal 5416. I waited for a nice cool overcast day... no sooner got the project started.. the sun came out! temp shot up to a close 90, in the boat easily 110! ARRRG! But, I stuck with and got it done. The jug of rotella I've been saving for this event is/was 15W40. Everything seems OK, oil pressure, sound, etc. I've always thought 20 w 50 was a better choice.
Please let me know if I'm not ok. WAIT! don't answer that!
err.. I mean the oil
