- Aug 17, 2020
- Reaction score
- Ram Year
- 6.7 Cummins
I am much amused by this and other threads of this kind. I run a fleet of diesel pick ups in Africa where we can neither obtain oil or filters without paying hge duties, fees and bribes; and have nowhere to dispose of the old oil except dump it on the ground, burn or export it. So for the last 20 years we have changed the oil on each truck only when some other maintenance is needed. We have had absolutely no/zero/zilch engine issues on the 16 pick up fleet over this time. Brakes, hydraulics, electrical, glass, bearings, tires, body, suspension have all failed, broken or otherwise needed attention. No engine issues.I don't think it's possible for engine oil to be too clean. Some people may change it much sooner than necessary but that's preferable to not changing often enough.
All the trucks have over 100,000 kms, the oldest a 2012 Toyota HiLux has 700,000+ and we have replaced the injectors and the pump. It has had 3 oil changes. All with Mobil1 or Shell (coincidence because it was available) but others have had BP and Total oils too. All with synthetic and we use the factory filters because we get Toyota to import those for us.
Our experience is that the air and fuel filter replacement is way more important than oil/filter and as I wrote, the **** fuss over this number of miles/months/starts for vehicles that I am sure few will keep to their natural death (which has to be more than its current owners expect or will achieve) is frankly, just feeding money to the oil companies. Better to buy their shares than worry about this.
Fuel and Air are full of varying materials (especially in Africa) and although we clean our filters some times rather than replace them when they are unavailable, we have found that keeping these clean does prolong the MTBF of the injection components.
With that, one caveat. We did try the Ford 7.3 PSD in the late 90s and soon ran into trouble with the injection systems that depend on oil pressure to a much greater extent than our Nissans, Toyotas and Daiwoos.
I used to do the factory, feel better, thing. I sort of felt it was like getting a medical, I would go to automotive heaven because I changed the oil at this or that interval until I had to deal with the TIA phenomenon where nothing of the sort is possible or affordable. And I had misgivings but all the old hands said I was just another of the First World freakniks imposing rules that were designed for reasons other than practicality.