Forum Discussion
rhagfo
May 07, 2018Explorer III
Cummins12V98 wrote:
Every 15K I change the oil and filter, both fuel filters and air filter. I use AMZ/OIL 15-40 along with MOPAR, FleetGuard and Raycor filters what ever is less expensive as they are all OE and TOP quality.
I spend about $230 every 15K using what I mentioned above for maintenance. I would allow $45 for every 15K for transmission service.
I have my oil analyzed and at 15k they say I could go longer but will stick to 15 while under warranty.
With our 5.9 we change ever 10K which worked out to once a year with 15-40 Dino oil Delo 400, Fleatguard filter. I also have oil analyzed with each change, was told to go for 12,500 miles, but the 10K works well.
If you see that BLACK Oil drain and worry, below is a couple pictures of the tappet gallery. This with just over 300K miles the cover gasket started to leak, this is how it looked as I removed the cover.


About Travel Trailer Group
44,026 PostsLatest Activity: Feb 22, 2025