Lunentucker
Well-Known Member
Well, the super-complicated advanced scientific doohicky usually reads right around 50% when I reset it.a “pentastar engineer” said this on BITOG:
“
Its way more than just hours and RPM. FCA uses oil temp, air temp, load, rpm even fuel type (ethanol %) and more. It's super complicated but very impressive. I'm far from an expert but do know the OEM develops a perfect vs. reality algorithm based on those (and more) factors/inputs. They create a very controlled duty cycle that is basically the max oil life for that engine under ideal conditions. When you drive outside that cycle you are given a penalty per infraction against that perfect cycle (fractions of a percent). For example if you are super hard on it you get a "high blow by penalty" of value __%. Or maybe you ran the engine hard when it was cold AND cold outside (intake air temp data) because you were late for work in January. Resulting in a penalty of ___% kind of thing.
I don't know the specific details of those penalties but I do know (at the time) that is how the algorithm worked. Pretty interesting stuff.”
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