Bought 2016 2.0 Turbo CTS with 1,036 actual miles and 13 months old. Elderly lady passed away not long after buying the car. Oil Life Monitor was at ZERO. I figured lots of very short trips to the store,doctor etc. I immediately changed the oil/filter myself using Mobil 1 in the proper viscosity. This is now my wife's car and it is her weekend toy. She drives it typically 40 miles a week on the highway and no short trips. Pampered garage queen. I was shocked when the OLM read 60% oil life remaining after only 4 1/2 months and 900 highway miles using top tier premium fuel as well. My wife is 62,drives conservatively,rarely stuck in traffic and little time idling. so the turbo is rarely active and she does not creep around slowly in it - ever. I'm wondering if the OLM would start ticking down to ZERO if the OLM was reset and the car was parked for 12 months (the recommended time between changes)and was not driven a single mile.
Seems like a big waste of expensive oil to change it at around 2,500 miles which is when it will be down to ZERO at the going rate. My question is: Does the OLM use time as one of the major determining factors when calculating oil life?
Seems like a big waste of expensive oil to change it at around 2,500 miles which is when it will be down to ZERO at the going rate. My question is: Does the OLM use time as one of the major determining factors when calculating oil life?
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