Comment by Joel_Mckay

I removed my anecdote and flash wear explanation, because of cranky folks like yourself.

The corrosion inhibitors in petrol engine oil get fully depleted within about a year with most brands. One may certainly sell the machine before you see acidified lubricant related problems, but the motor will not reach its full operational lifespan ( https://en.wikipedia.org/wiki/Bathtub_curve .)

I do agree that anyone with a CVT style transmission likely won't have to worry, as that entire section will probably need replaced before you see significant hydrodynamic bearing damage.

"Buy cheap, buy twice" as they say...

ymmv, best of luck. =3