on my 32 i do the same every 50 hours and tranny every 100 hours .same on the generator and so far after 30 years no problems with anything .other than a blown generator due to lack of use and had to get a new one In a message dated 5/28/2019 9:20:16 PM Eastern Standard Time, sentoa@lists.sentoa.org writes: We change oil and filter every 100 hours on our Cummins and the oil in the transmission every 250 hours. What seems unreasonable is the cheapest insurance that your engine will continue to run without costly repairs. Happy Cruising Dave BellEscapade 37-058 On May 28, 2019, at 3:07 PM, Peter Skewes <peteralan@nctv.com> wrote: Hi, I have a NT32 with a Cummins QSD 4.2. Manual says an oil and filter change every 100 hours or annually. We are on the loop, and that means oil changes every 3-4 weeks. This seems unreasonable, but every source I find says “100 hours”.  Any help would be appreciated.   Peter Skewes NT 32 _______________________________________________ Sentoa mailing list Sentoa@lists.sentoa.org http://lists.sentoa.org/mailman/listinfo/sentoa_lists.sentoa.org

I never really questioned the 100 hr rule since it lined up pretty well with our seasonal usage and it was convenient to change the oil as part of the winter layup. If you think about it, it also lines up pretty well with the traditional 3000 or 5000 mile advice on cars (say 100 hrs at 30mph avg for instance.) That said, my car has an oil monitor that supposedly is based on driving pattern, or some such. Too bad there isn't a similar function on the new common rail diesels with their ECM's. I can see where running 6 hrs a day - maybe doing the loop or ICW - you'd run up on 100 hrs pretty quickly. Seems like an off-engine oil filtration system would be welcome. For those making these long runs, what's your practice? Jim Waskowich x37-142 Grand Adventure On Wed, May 29, 2019 at 8:23 AM Ffb via Sentoa <sentoa@lists.sentoa.org> wrote: > *on my 32 i do the same every 50 hours and tranny every 100 hours .same on > the generator and so far after 30 years no problems with anything .other > than a blown generator due to lack of use and had to get a new one* > > In a message dated 5/28/2019 9:20:16 PM Eastern Standard Time, > sentoa@lists.sentoa.org writes: > > > We change oil and filter every 100 hours on our Cummins and the oil in the > transmission every 250 hours. What seems unreasonable is the cheapest > insurance that your engine will continue to run without costly repairs. > Happy Cruising > Dave Bell > Escapade > 37-058 > > On May 28, 2019, at 3:07 PM, Peter Skewes <peteralan@nctv.com> wrote: > > > Hi, I have a NT32 with a Cummins QSD 4.2. Manual says an oil and filter > change every 100 hours or annually. We are on the loop, and that means oil > changes every 3-4 weeks. This seems unreasonable, but every source I find > says “100 hours”. Any help would be appreciated. > > > > Peter Skewes > > NT 32 > _______________________________________________ > Sentoa mailing list > Sentoa@lists.sentoa.org > http://lists.sentoa.org/mailman/listinfo/sentoa_lists.sentoa.org > > _______________________________________________ > Sentoa mailing list > Sentoa@lists.sentoa.org > http://lists.sentoa.org/mailman/listinfo/sentoa_lists.sentoa.org >