Originally Posted by Kevlar7r
I use Rotella T 15w40 in my engines. Its a heavier duty oil, with much more wear-control additives. It's also widely available and relatively inexpensive.
I actually use it in all my vehicles with the exception of one. My lawn tractor, weed eater, ford truck, Cummins diesel, and even my Honda generator. Never ever had an oil related issue.
Being a newbie to boats, and particularly my 2001 Maxum 1800SR, I searched around this forum and found that information about using Rotella, which made me happy, because I faithfully use it in my old diesel Mercedes wagon. Approaching 300,000 miles and going strong.
Rotella seems to be doing a great job in the Maxum, too!