What I understand the ECM (Engine Control Module) takes into consideration a few parameters (idleing time, stop and go, highway speed, run hours, miles driven, etc.) that counts the clock down for the oil life. It's amazing what that ECM does/keeps in memory. I know the insurance companies would love to be able to tap into that information after an accident to be able to determine at the time of the accident like air bag deployment, speed, seat belt wearing, braking and mucho, mucho more... I have only 3,000 on my 2013 JKU and I changed the oil a few miles ago and I went thru the reset procedure even though I didn't have the "Change" indicator showing and I'm hoping it reset back to 0. We'll find out. I'm a creature of habit and change it at 3,000 miles anyway using good oil and filter.
BTCS, USN, Retired
2013 Jeep JKU Rubicon 10th Year Anniversary.