Kayteg1 wrote:
7 gallons or 2.5 l of oil for every liter of engine displacement.
For comparison, my newer cars are closer to 3l of oil for 1l of displacement.
Are you trying to make some kind of a point by referencing the amount of oil per liter of engine displacement ??
The important point is that your diesel engine contains about 6 times the amount of oil in a gas car or truck engine. Just that alone would make you think it could go 6X as long between changes. Add to that the fact that diesel fuel is closer to the viscosity of lubricating oil than gasoline is (so that less dilution occurs) and you are up near 100,000 miles.
Car/truck makers also say that you can go 100K on a set of plugs.
For the cost of a set of plugs or 7 gallons of oil, I won't be doing either.