To raise a few eyebrows on the subject. Have no opinions, just the facts. Last place I worked before retiring had about 900 OTR rigs, running N14 Cummins power. When I started driving there, oil was dropped at 12k miles. This gradually grew to 15k, then 20k. Later it was chassis lube/inspect at 15k, drop oil at 30k. By the time I retired it was lube/inspect at 20k, drop the oil at 40k. Samples sent to lab at each drop, lab report forwarded to Cummins. Cummins gave the ok for warranty purposes. Used Rotella & Delo oils. Don't recall any engine failures while there. Consumption wasn't excessive, personally for first 300k wouldn't have to add between drops,later had to add a gallon at around 30k. Usually make veteran drivers take a new one off the lot at around 450k, assign the older units to new recruits, replace at around 550-600k. By that time rookies would have a track record, get a new rig. Willie
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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