Most diesel-engine wear is caused by abrasive soot particles at high loads combined with low RPM. High loads combined with low RPM decrease the minimum oil-film thickness (MOFT), which causes the abrasive soot particles to grind onto sliding metal parts and wear them away.
Advice:
(1) Don't run the shredder when the truck is idling. If you need to do so, install some type of idle-up mechanism so that when the shredder is turned on, the engine automatically runs at higher RPM. That's because the minimum oil-film thickness is inversely proportional to load and directly proportional to RPM. You want to keep the oil film thick, which means you need higher RPM when there is load.
(2) Don't run anything thinner than 15W-40 on these engines, as the oil-film thickness is also proportional to viscosity. Don't run any certification other than API CJ-4, which has excellent soot control. I recommend Mobil Delvac 1300 Super 15W-40.
(3) Soot builds up over oil-change interval. If there is a lot of idling, you should change your oil frequently as soot will also build up during idle. Abrasive soot particles are what damages diesel engines; so, change your oil frequently. If you are idling 10 hours a day, this is equivalent of 500 miles or more of driving. This means you need to change the oil every month or so. Again, don't use anything other than API CJ-4 (excellent soot control) and 15W-40 (thickest oil film among diesel-engine oil viscosities). Once more, my recommendation is Mobil Delvac 1300 Super 15W-40 with an oil-change interval of no longer than about 30 days. You can also use any other major-brand API CJ-4 15W-40 with approximately 30-day oil-change intervals.
Advice:
(1) Don't run the shredder when the truck is idling. If you need to do so, install some type of idle-up mechanism so that when the shredder is turned on, the engine automatically runs at higher RPM. That's because the minimum oil-film thickness is inversely proportional to load and directly proportional to RPM. You want to keep the oil film thick, which means you need higher RPM when there is load.
(2) Don't run anything thinner than 15W-40 on these engines, as the oil-film thickness is also proportional to viscosity. Don't run any certification other than API CJ-4, which has excellent soot control. I recommend Mobil Delvac 1300 Super 15W-40.
(3) Soot builds up over oil-change interval. If there is a lot of idling, you should change your oil frequently as soot will also build up during idle. Abrasive soot particles are what damages diesel engines; so, change your oil frequently. If you are idling 10 hours a day, this is equivalent of 500 miles or more of driving. This means you need to change the oil every month or so. Again, don't use anything other than API CJ-4 (excellent soot control) and 15W-40 (thickest oil film among diesel-engine oil viscosities). Once more, my recommendation is Mobil Delvac 1300 Super 15W-40 with an oil-change interval of no longer than about 30 days. You can also use any other major-brand API CJ-4 15W-40 with approximately 30-day oil-change intervals.