Being Toyota does not say you can go longer, I would say No! Change at 10,000 miles on ODO. or one year.
You can do whatever you like anyway. But any damage due to ignoring mfgr maintenance schedule would not be covered. See Magnusson-Moss warranty provisions. Safe thing is either follow 10M odo miles or have the oil tested at that point.
This may be stupid question...but is there a grace overlap there? Say I get it changed at 10,050. Will they count that as 10k?
I'd go less than 10K miles, not more. Even with synthetic oil, the fact that the oil doesn't stay hot for long (to burn off water vapor that can form hydrochloric acid in the oil) more than cancels out the lower total engine run times. We're going to have it done every 7500 miles after the first break-in oil change. We will also have the trans given a "wear-in" fluid change at 15k miles. That will translate to about every6 - 10 months with the oil changes. Hopefully they have fixed the 5k 'reminder' message so it now comes on at 10k...?
Mark, IMHO, no manufacturer would allege, nor an arbiter accept, that your 50 extra miles caused damage. US warranty law does not void the entire warranty for any technical failure to follow recommendations, but rather only voids the portion of the warranty reasonably related to the action of the owner.
No question, especially since you need a dealer or a code reader with editing function to reset it. 7500 miles is a good interval for both oil change and tire rotation for cars like this.
You can easily reset the maintenance indicator from the owner manual without a code reader or dealer. In fact it is not reset with a code reader.
I believe that changing oil every 10,000 miles is pretty cheap insurance. We have 107,000 miles on our 2010 Prius and I have been changing the oil every 10,000 miles. I put in only 4 quarts when I change and at 10,000 miles nearly all 4 quarts come out. This is one engine that could easily go 300,000 miles.....
In my 2010 and the 2010 owner manual, reset is with a simple hands-only sequence. I have and use a ScanGauge II which is, among other things a code reader and code clearer. It is not used or helpful in resetting the maintenance indicator.
I can't see how the PiP and the regular Prius have the same oil change interval unless Toyota assumed that the owner would not be doing any charging and driving it like a regular Prius. I have almost 5k EV miles this year. If I changed the oil every 10k miles, then that would be like changing the oil every 5k miles. I known it's cheap insurance to change it sooner. I'm just wondering if counting only HV miles on the PiP would produce the exact same engine wear as counting the regular miles on a standard Prius if driven exactly the same way? My thinking would be yes because EV miles are only counted when the motor is off.
Your theory makes sense. Unfortunately it costs about as much to run an oil analysis as to change the oil. By all means, report back with your results. If some folks have the testing done, then your theory would attract some owners to extending the interval. From Toyota's standpoint, think about the HOV buyers who never plug in. There it is the same as a Liftback on this score. I'm not surprised they skipped the option to add EV miles to the interval just for simplicity.
