nikko

Something interesting I've noticed today: whenever I put 1000km on my car (which is approx. 600 miles....ah well...I am Canadian) oil life is always 10% less.
I am at 2500km and MID shows 80% and I bet as soon as I get to 3000km
MID will display 70%.
What algorithm is used by our cars to calculate oil life?
Thanks

Ron A

But as the mileage increases, it probably makes the percentage go down faster.

Repecat

Road Rage said that he thought that the oil life algorithm was non-linear. However mine was linear from 0 to 4000 miles (50%), but it may change in the next 50%. I'm trying to keep track of its progression.

SouthernBoy

I noticed that around 4,500 miles, my MID went to "<20%" but when the odometer turned 10,000 miles, the MID told me that A1 service was due soon.

caball88

i thought it was linear as well when i first got the car and noticed that it was about the same mileage when i had to change the oil. but after my most recent oil change the % has gone down at a lower rate and i am closer to the point where i am expecting about 50% but the mid only says 70%.