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2014 Sienna LE
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The maintenance light is not intended to tell you specifically that an oil change is needed. That’s why it says “maintenance due soon” and not “oil change due soon”. If you reference your 2022 Maintenance and Warranty Guide, you will see the maintenance required is every 5000 miles, and that it only says to change oil at 5000 miles if you do repeated trips under 5 miles below freezing temps, tow, use a car top carrier, or have heavy loading, drive on dusty or dirty roads, or have excessive idling like a police, taxi, or delivery vehicle. Otherwise the oil changes are specified at 10,000 mile intervals, and the 5000 mile in between maintenance is typically (but not always, refer to the manual for your specific mileage) just for tire rotations and general visual inspections.
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So the maintenance reminder is just a 5000 mile countdown. Note it counts down from the time it was reset, not every 5000 miles on the odometer, and comes on a few hundred miles before the actual 5000 mark saying “soon” and drops the “soon” part once you cross the 5000 mile mark.

I’ll leave it up to you how often you decide to actually change your oil. I won’t get into the how often you should change your oil, except for saying my experience and testing on other vehicles indicates the manufacturer specs have been just fine for me, and that you can always test your oil with a place like Blackstone Labs to see if it’s good or needs to be replaced sooner (or if it can even be run longer) which I have done in the past on other vehicles.
 

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2021 Sienna XLE
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763 Posts
There are actually two mileage countdowns, one is 5000 miles and the other is 10000 miles for the oil change. The maintenance reminder on the MID comes up as the 5000 mile countdown is nearing 0. The oil change 10000 mile countdown is shown on the odometer display. (cycles between total miles, trip A, trip B, and oil countdown. They are supposed to reset only the 5000 mile countdown at the 5000, 15000, 25000 mile interval and reset both every 10000 miles. The dealer staff does not seem to know this and resets both every time.
 

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Personally i have seen what a brand new engine looks like inside (oil pan removal) after just 800 miles. Some glitter from the manufacturing process that will not get drained by a normal oil change. The surest way is to remove the pan. Next best thing is to replace the oil / filter as soon as 5k miles (or less). Better yet - get a strong magnet and put it in the oil pan (Outside of course). Run it for another hundred miles (To catch any metallic particles. When you do that first oil change - guide (slide) the magnet near the drain plug then drain the oil.
 
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