FYI-Oil Life Update

[CapitalTruck]

For everyone that stretches their oil life out to the far extreme, note GM has now capped it at 7500 miles.

 

 

 

Oil Life Monitor Calculation Pathways:

1. Engine revolutions- Oil life starts with a fixed number of revolutions and will decrease with each revolution. Cold / hot coolant temp readings have multipliers that reduce engine revolutions pathway quicker depending on how far from the normal oil temperature the vehicle is operating.

   Note: If engine coolant temp gets above 260F, engine overheat condition, the oil life will go to 0%.

2. Mileage from last reset – Starting with MY 2013, the OLM is capped at 7500 miles for all GM powertrains except the Volt. In perfect conditions a vehicle would reach 7500 miles from the last reset and the oil life left would be 0%.
3. Time- This pathway is a liner function, a fixed decrease in oil life for a given time after the oil life is reset. The oil life will drop to 0% after 1 year regardless of the amount of engine revolutions or how many miles since the reset.

   Note: The Volt uses a 2 year timer instead of 1 year. It also uses the engine revolution counter. It does not use the mileage pathway to count down.

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[Gurrzt]

The reason for that is GM uses a "synthetic blend" oil vice a full synthetic oil.

 

I use the "Mobil 1 Extended Performance" oil and change it every 10k, it comes out pretty clean.

[Z45]

I use AMSOIL Signature Series and go 1 year or 15,000 miles whichever comes first. Have used AMSOIL for over 40 yrs (since 1975) so it has proved itself to me that I won't use anything else.

 

Keep in mind that everything GM recommends is designed to make them and their dealers money.

['01LS1]

Have been doing 5,000 mile changes using Mobil 1 EP & matching filter. Know it is rated for 15,000 miles, but rarely get hwy miles.

Probably wasting money doing it that way. The oil goes to a local shop for heat.