2018 Silverado 400 miles 38% oil life

[SS502]

6 minutes ago, buckeyeguy142 said:

Thats why i was concerned not rest only 400 miles is a 2018 and oil life is 38% how can that be possible, would have read 98% if reset so somehow this is true, can't be the mileage can't be just sitting on the lot, what would cause this ? 

Deception 

[redwngr]

10 hours ago, qwank said:

What's even more confusing is I don't believe it says anything about time in the owner's manual, But I have confirmed this with GM tech assist after The first one I saw at 0% 

Sure it mentions time.  

(Although I always though the reason for the time note was the algorithm not taking time into consideration

 

This is the 2018 manual, but others are similar:

 

Engine Oil Change
When the CHANGE ENGINE OIL SOON message displays, have the engine oil and filter changed within the next 1 000 km/600 mi. If driven under the best conditions, the engine oil life system may not indicate the need for vehicle service for up to a year. The engine oil and filter must be changed at least once a year and the oil life system must be reset. Your trained dealer technician can perform this work.
If the engine oil life system is reset accidentally, service the vehicle within 5 000 km/3,000 mi since the last service. Reset the oil life system when the oil is changed.
See Engine Oil Life System 0 340

 

 

On a new one, it was probably never properly reset when it was built/tested.

 

[qwank]

13 minutes ago, redwngr said:

Sure it mentions time.  

(Although I always though the reason for the time note was the algorithm not taking time into consideration

 

This is the 2018 manual, but others are similar:

 

Engine Oil Change
When the CHANGE ENGINE OIL SOON message displays, have the engine oil and filter changed within the next 1 000 km/600 mi. If driven under the best conditions, the engine oil life system may not indicate the need for vehicle service for up to a year. The engine oil and filter must be changed at least once a year and the oil life system must be reset. Your trained dealer technician can perform this work.
If the engine oil life system is reset accidentally, service the vehicle within 5 000 km/3,000 mi since the last service. Reset the oil life system when the oil is changed.
See Engine Oil Life System 0 340

 

 

On a new one, it was probably never properly reset when it was built/tested.

 

If you go to the page that says "see engine oil life system" it explains what the algorithm uses, but doesn't mention time there. 

[fairway605]

My last oil change was on 5-20-18, I've only put 340 miles on to date and I'm at 95%.