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Originally Posted by suburbia
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before you get soo cheeky suburbia, I'd suggest you look at what is happening in the industry right now.
For everyone else I will sum it up, due to less tolerances and better manufacturing standards coupled with increases in oil technology has increased the service interval on modern vehicles. While the manufacturer is recommending an increased service interval, many of the retail shops are lagging and using old intervals.
This gets complicated by the fact many cars now come equipped with a form of oil life monitoring which informs you when to get a change. SO if the shop is saying 5k or whatever, and the car is saying you still got 5k left and the manufacturer says listen to the car, is this so simple?
an example of this is my car, i had my oil changed at a dealership who said 5k was the service interval. Ford states 16k or one year whatever comes first. So if I followed the dealership I would change my oil 2 additional times at a cost of $120 a pop when it was not necessary.