Do you trust the service indicator in your vehicle?
In my BMW I never question its validity and always take it in when the vehicle calls for service since it's free for a while. My first oil change being just over 5000 miles.
Using the same rule in my late model Chevy 5.3L V8 truck, I read that it was safe to change the oil when the oil life reaches 15% This means the service interval can be 5000 miles to 10k miles depending on set algorithm based on driving conditions. One particular dealer told me that it is imperative that I change my oil every 5000 miles or less no matter what. (Unfortunately GM only gave me 2 free oil changes)
My question is how does a brand new small block V8 consume 1 quart of synthetic oil every 1000 miles as suggested by the dealer when there are only 6 quarts of oil in there. I usually change oil at 25% life or around 7500 miles in my driving situation.
Based on their assessment, there would be negative 1.5 quart of oil in the crankcase.
I would like my vehicle to last but I also don't want to be duped.
Every website I read including GM indicated that the indicator is pretty accurate. Is there something I'm missing here?
Last edited by GenXer; 02-02-2020 at 11:47 PM..
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