Ok--back to realistic service intervals. Daimler Detroit says on a DD15 for example, we could run oil change
intervals from 40 to 50,000 miles on heavy haul {100,000 GVW} and 60 to 65,000 at {80,000 GVW} with
oil Sampling. I don't do OIL SAMPLING. Using 10x30 synthetic. Synthetics are good but not that good, and
the DD15 is a good engine but not that good. So the average mileage of any trucks we have is 135,000
a year---A total of three full services under their talking point/word salad sales pitch.
I set the Max at 30,000 have had zero issues but that oil is about as nasty as it gets, so black and thick
with soot the waste oil burner struggles unless I cut it with LSD. Now I do know of some companies
that tried the 50 grand oil change intervals, and it ended up costing them 50 grand each, with warranty
claims pending for awhile now.
I only use OEM filters/cost less than aftermarket. My point is why should I be sampling oil to meet
the factory guidelines-If it comes back with a bad report what the hell did we save, nothing. But
someone made money doing all these sampling testing/reports. How many barrels of 10x30 synthetic
could I buy for 50 grand? No matter what the manufacture says it's nothing more than pandering for
a sale. Use common sense and set a service interval that's realistic. I can see sampling for final drives
in a Cat otherwise no.
Another asinine pandering sales pitch is Cummins overhead adjustment interval for X15.
No need according to Cummins to adjust the overheads till---------------------500,000. Well that ain't
happening either the 7 we bought a year ago will go in at 175,000 to be checked.
Donelson Power Core engine air filters suppose to last a full year running over the road----BS.
7 to 9 months and those are loaded heavy as hell, change it and mileage slightly increases plus
the DPF lasts longer.