Quote:
Originally Posted by mycows
If you are referring to Cat 3116 and or Cat 3126, I believe there is a technical service bulletin specifying 30 wt oil only for those engines. I always used Shell rotella 30wt but not easy to find on the shelf. Local Shell dealer in Portland was happy to sell it to me in 5 gal pails. You might try boatdiesel.Com for advice…
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A quick Google search pops-up that Cat retired production of these engines in 2004. Straight 30w may have made sense 20-years ago, but what about in today's age of greatly improved lubricants? As an owner with a 30-year old Perkins, I've struggled with this type of update. Given modern menu of oil, what would Perkins (or Cat) have spec'd back then? Probably not straight weight, but maybe.
Peter