I have been advised by a manufacturer of engines that they do not publish an acceptable rate of oil consumption per hour because of varying load, etc. We have one that may be consuming excess oil and it would be easy to say x number of quarts in x number of hours, etc. to decide on warranty but they want compression tests, bore scopes, etc. that will be difficult and time consuming especially since the method of repair will always be to just R&R engine assy. Maybe they are just trying to make it hard and just make the owner add oil and go away. Is this the case across the industry or do some publish figures which exceeded will result in warranty acceptance?
I can only speak for Cat but they have tables (that are not widely available in the public domain) relating litres of oil consumed vs litres of fuel burned. Operating hours has nothing whatsoever to do with it. Relating oil used to fuel burned takes into account load factors.
In the past I used crankcase pressures to force the issue. That don't work anymore with the EGR stuff installed on diesels now.
Deere does too, but not out in the public domain. Actually Deere publishes Crankcase pressure specifications on iT4 and FT4 engines.
Cat truck engines considered 1 litre of oil for 250 litres of fuel used to be the warranty repair point.
Mercedes industrial V8's gave a figure of .05% of fuel consumption as the max oil consumption in the 90's
There is one area Manufactures are careful of {DPF systems}. A engine using oil will plug the DPF way faster, when it comes to warranty the manufacture will dance around that one. Cummins has a wonder oil for their ISX model, The oil is made by Valvoline just for the ISX burner {$845.00 for 11 gallons} {cheap} It's used for one oil change interval. It does work I know this because we in the shop were doing the service work on this customers truck at the time. It was using a gallon to about 220-260 gallons of fuel which worked out to 1000 miles give or take and it's a 2017.
You mean you put the wonder oil in for one oil change and it is supposed to tighten up the rings or whatever?
I knew when I posted that it would raise eye brows- We didn't change it---It was done at Cummins. Engine had 70K on it IIRC. What was in that crap I have no frigging idea. Everyone on here that reads that will be saying in their best countryfied voice {Now what in tarnation is that there Truck Shop try-in whip up on us now? Cummins is got some sorter Bon Ammi Oil that thar a keep'n a secret from the world.
Cummins mystery oil = lower oil consumption Lower oil consumption = Less oil needed in the market Less oil demand = massive oil industry lay-offs and bankruptcies Layoffs/bankruptcies = Some of us will finally meet each other in person, shaking hands while standing in the nearest government soup line.
Way too much optimism for me.
I'm ready been whittling/carving a wooden bill to go peck **** with the chickens.