So this begs the question: If you change your own oil, what kind of records should you/must you maintain that "proves" you kept up with maintenance in case of a problem that should be covered under warranty down the road?
Scott O'Kashan will love me posting this, but we are over-thinking this ... Directly from the 2014 Corolla Warranty and Maintenance Document:
MAINTENANCE
You are responsible for performance of
the required maintenance indicated in the
Owner’s Manual and this booklet. Toyota
will not deny a warranty claim solely
because you do not have records to show
that you maintained your vehicle. However,
any failure or noncompliance caused by
lack of maintenance is not covered by this
warranty.
When maintenance and repairs are paid
for by you, these services may be
performed by you or by any automotive
service provider you choose. Toyota will
not deny a warranty claim solely
because you used a service provider
other than a Toyota dealership for
maintenance and repairs. However, any
failure or noncompliance caused by
improper maintenance or repairs is not
covered by this warranty.
Basically - if you skipped an oil change, you are probably okay, but if it is pretty obvious that the engine was run for 50K to 100K miles without an oil change (based on condition), it is good to have receipts.
As Donabed said - it is a good idea to keep a log of when service was performed and keep your receipts. (That is for the Toyota warranty - if you got a third-party warranty from the dealer, it might require you to have service receipts - in this case, it might be worthwhile to make a deal with a mechanic if one would be agreeable: i.e. "I do my own oil changes, but I need a receipt for the oil changes. Let me pay you $5 or $40 and please give me a receipt for an oil change, but you don't have to touch my car." (Not sure this would work as the mechanic is somewhat accepting liability for the issue - i.e. if you didn't change the oil, if you stripped out the drain plug ...)
Tiger, the 1ZZ and 2ZR use full synthetic, with the 2ZR having 10k intervals.
Not sure what the 1ZZ and 2ZR are - I googled it and didn't come up with anything useful - I think the 2014 USA Corolla uses the 2ZR with valvematic on the LE ECO versions.
Note, the Maintenance Guide is somewhat in error on this - it says 0W-20 has a 10K mile or 12months, but 5W-20 mineral oil is acceptable, but if it is used, the oil must be changed back at 5K miles or 6 months to 0W-20 oil.
Flaws:
- In theory, if they ever make dino 0W-20 oil, I am fine to run that for 10K miles, even though that is not intended - moot point as 0W-20 is full synthetic by definition currently.
- The book doesn't say ANYTHING about 5W-20 Synthetic oil. In theory, that should be good for 10K miles as well, but the book doesn't mention it at all.
- According to the book, I can't just use 5W-20 Dino oil at 5K intervals indefinitely. I can use it once, but then I have to switch back to 0W-20. (As written, I could use it every OTHER oil change).
- The maintenance intervals don't line up - i.e. it says at 10K, 20K, 30K miles, I have to change the oil, but at 15K, 25K, 35K, I have to change the oil if 5W20 was used last time. Let's look at this in practice - at 10K miles, I decide to use 5W-20 oil. At 15K, I change back to 0W20 oil per the manual. This should be good for 10K miles, but when I hit 20K miles, the book is going to tell me to change the oil again.
All of this is tilting at windmills though, b/c as the book says, I could run dino 5W-20 at 10K intervals and as long as it isn't obvious that the extended oil change caused the problem, I am covered. (Not that I recommend this - the engine would likely fail at 75K (outside the 60K powertrain warranty), rather than 150-200K or more otherwise.)
The maintenance required light is a sign to rotate tires, on top of everything else.
Technically:
Check installation of driver’s floor mat
Inspect and adjust all fluid levels
Inspect wiper blades
Rotate tires
Visually inspect brake linings/drums and
brake pads/discs
And some other things for severe service, but in reality ...
Wiper blades and tires aren't covered under the warranty - it doesn't say to re-balance the tires or align the front end. Non-rotated tires will wear sooner, but it is unlikely even a badly unbalanced tire would wear out the shocks, and they don't tell you to balance them anyway. If I fail to check the coolant and the radiator runs dry at 7.5K miles, it is hard to verify if it leaked out in the last 2.5K miles or whether checking it at 5K would have prevented the issue - same with brake pads/linings.
If you aren't doing the work yourself and you reset the light anyway, the dealer may note that the second you skip a service with them. It's paranoid, yes, but why chance it?
Again - the risk is the same with or without the light ...
i.e. If I reset the light without taking the car to the dealer, the dealer might say "You were due for an oil change at 10K miles". It is up to me if I want to have a receipt from Jiffy Lube, have a receipt for the purchase from Wal-Mart, or just say I changed the oil myself when I didn't and hope the car doesn't fail from old oil.
But the same thing is true if there were no light to reset - when I take the car to the dealer at 11K miles and he can't show I brought it in at 10K for the oil change, he is going to tell me exactly the same thing with exactly the same options on my part.