I have not had an engine last more than 45K miles in the past 10 years on 30wt never mind 20wt. But My commute is the equivalent of 20 1/4 mile drag runs and 5 laps WOT of Watkins Glen EVERYDAY. Poor flogged yaris. I'm harder on my cars than just about any sane person. I even blew a motor in the first hour of ownership(KIA RIO5 1.6L)
While I don't like to join in on any gang tackles, I could really use a bit more detail on this.
I'm trying to figure an hour equivalency to determine if you're trumping water craft fatigue/refresh times with how you're driving the thing.
I'd say that you're harder on cars than most less than sane people too
There are a few things that are puzzling. To do that much carnage to an engine, you would be buying cars quite often. That usually runs out of steam as you progressively get upside down as you move forward. If you can continue to do this, that implies a fatter wallet, which usually means you buy more robust cars than a Yaris. That would be the last thing most people buy if they have a wallet fat enough to scoff at bi-annual trade ins with blown engines (or thereabouts)