Sure. Excessive oil changes, particularly with improper oil or done by actors which have lots of incentive to minimize expense (ie: dealers, quickie lubes, etc.) are well recognized as contributing to intake contamination.
"
Excessive oil changes...are well recognized as contributing to intake contamination."
Well recognized by...???
That's news to me, so I cannot be counted among those who recognize that. In fact, that sounds counter-intuitive to me. Is there a study, a paper, something/anything I can read up on to inform me of how that's possible?
And while we're at it, please define what is meant by 'excessive'. Are we talking 3K mile OCIs, 50 mile OCIs, 12 hour OCIs, etc.?
Wait, n/m, I'm sure the definition of 'excessive' can be found somewhere in the write-up you're going to link to...you know, the one that will convince me the original assertion is true after reading it.
"iatrogenic" means induced by the maintenance or corrective procedure itself. Its a term from medicine, but applies to vehicles as well.
Okay, this is the first time I have seen it used, but now I know a new word. Thank you for adding it to my vocabulary...although, I'm not sure I will ever be able to use it in a contextually accurate way, but thanks just the same.
Rental cars receive their maintenance per the manufacturer's schedule (or even slightly less frequently), ...
I would like to think that is true, but I have no data to show me one way or another. Can you paste in a link or two to the data source(s) you used to arrive at that conclusion?
...so they don't suffer from damaging over-"maintenance".
I still maintain over-maintenance isn't necessarily damaging, so let's set this aside for now...
Unfortunately rental fleets are not immune from the problem of improper maintenance,
I think you are 100% correct - rental fleets are not immune from improper maintenance.
I'll go on record saying it too: Rental cars receive improper maintenance all over the country, regardless of rental company, car manufacturer, or car make/model. Not EVERY rental car, mind you, but at least some definitely do.
But it sounds like you are classifying what you refer to as 'excessive oil changes' to be a type of improper maintenance, and I still say that is not yet an agreed-upon fact. So...
but at least they're exposed to less of it.
less than who/what? My car? Your car? What type or group of cars gets more of the excessive/improper/proper/inadequate/adequate maintenance than rental cars?
I only ask because my initial feeling is that this is another opinion, unsubstantiated by any data, but I want to make sure I'm clear on what you're saying before I declare it to be such.