It has to do with emmissions. Engines today have low tension piston rings for fuel economy and add to that that the rings are- by design- installed in a fashion that favors controlled blow- by.
These factors both work against oil control, so therefore oil usage is increased. The automotive industry was the first to battle this emmission issue. It's now acceptable for an automotive engine to loose 1 quart of oil in 1,000 miles. That kind of usage wasn't heard of 30 years ago.
All this- in the name of progress.....
Oil is just oil!!Wrong.the technology involved in oil there days is amazing.I know a truck that would burn more oil than diesol that was cured by just changing the oil back to the proper manf SPEC.
Like swoop says some engines use a lot of oil while running in, it just depends what make it is?
I remember one of my customers having Linde H50D's with air cooled Deutz engines and they used a horrific amount of oil while running in.
It was a 24 hour operation and if the drivers didn't check the oil they could run them off the dipstick in a week, but when they run in they were fine..
yessir, we need more input....
make
model
serial number
and which diesel engine does it have?
how many hours are on the truck?
generally any engine will use oil at first till it breaks in
and generally within the first 50 to 100 hrs of use it is required to change the filter and factory oil to the specified oil listed in the specs of the truck.
and just for curiosity's sake, what are the other oil levels in the transmission and hydraulic at? are any overfull?
until we have better information we all will just be rambling in general like i just did ;o)
Most engines use a bit of oil, as long as the oil consumsion is within the manufacturers specification the customer has nothing to worry about.
At least it sounds like they are actually checking / keeping an eye on the oil level which is a good thing.
During the bedding is process some engines can use slightly more oil to.