As far as I know, all trailvoys of all kinds have oil life monitoring systems built into the PCM. The base models use it to light up the oil reminder dash lamp, but the actual percentage of oil life left can be sent to Onstar if you pay for their monthly reminder email. The higher end models with the DIC can read the percentage on the display.
the system works great.
U MUST check the oil level every now and then.\these engines dont use much oil...
but a few have reported they trusted the Oil life monitor- and when they changed oil.. it was low by several quarts--- theyd never checked the level.
In my case... my engine uses very little oil.
Several times Ive gone 10,500 to 11,000 miles-- and Ive removed 6.75 quarts and 6.25 quarts on several occasions.
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