Originally Posted by Traveler0980
So how many total miles were on the oil when it reached 6%? I wouldn't expect the mileage to be linear with the percentage. The algorithm deals with engine temperature and run time between stops.
9,200 miles on this oil.
Given that the algorithm is created by Chrysler rather than being based on some impossible realtime oil quality sensing, there's no reason that the algorithm has to go completely nonlinear at the end like this.
What's the point of a numeric value like this if one can't use it to plan? As you can see, the algorithm has essentially followed the linear model for the first 9/10 of the expected lifespan range or there's no way it would have gotten this far.
There's an order of magnitude increased decay here. I was planning to change it at 5%, but it dropped from 8% in 40 miles yesterday.
Before they "fixed" the algorithm last year, a very similar nonlinear decay rate existed except it kicked in around 60% remaining life: more or less linear to that point, then the decay rate accelerated until towards the end I saw it drop by 1-2% in a matter of 5 miles.