I just installed the winter rubber the other day and was really surprised at the tire wear on the OEM's. Yokohama Geolander G91. They were down to the wear bars with only 22,000kms (13,640 miles). (uhm)
That's really amazing. Did you mean to say the wear bars are actually flush with the rest of the tread?
I know OEM's are usually poor quality, but this is sort of a joke.
My experience has been that OEM rubber is usually a jack of all trades. My Ford F-150 was the exception to that rule. Those tires were made to a tight price point and were complete crap. My Subaru, Volkswagen Eurovan, Volvo S80 and CX-5 all came with pretty commendable, jack of all trades, rubber. You can always get tires that will do better at what you want (whether that be handling, grip, MPG, quietness, longevity, hydroplane resistance, steering response, etc.) but you're unlikely to find a tire that can do everything better, or even most things better.
I monitor pressures, park in a garage, rarely see gravel.
What pressures were they maintained between? Is it AWD? AWD is sensitive to the pressures all being the same (or, more accurately, their effective diameters all being the same).
After I swapped to the winter tires, Nokian Hakkapeliitta r2, had to do a quick test run, and notice how much quieter and better handling with winter rubber. How the heck does that work?
Yeah, my winter tires handle better than the Geolanders too and they're about the same noise level.
I knew I'd be buying tires, but thought it wouldn't be so soon. Sort of interesting reading this thread, that the mileage results are all over the board.
I can only speculate. There are environmental factors like temperature, speed, abrasiveness of road surfaces (which is a huge factor), weight, air pressure etc.
Then there are internal factors like the curing of the tire rubber. There is a lot more to tire "rubber" than meets they eye. The stuff is almost alive in that it continues curing during your ownership. But generally the problem is an accelerated cure caused by excessive heat. If this excessive heat is a one time thing (or happens only periodically) it can over-cure the rubber which causes it to harden and last longer under some conditions (and always at the expense of grip). Your tire life was so short I suspect one of two things happened.
1) Not fully cured from the factory leaving the tires feeling fairly grippy but they might feel "greasy" under really hard cornering.
2) Over-cured (either from the factory or from a number of excessive heat events). This would leave the tires feeling slippery, especially in the cold and wet.
Now normally over-curing would make the tire last longer but I'm wondering if hardened rubber combined with driving on sharp chip-seal type roads might not cause thousands of micro-cuts in the too hard rubber, cuts that might not occur if the rubber was softer and more compliant, cuts that could cause micro-chunking too small to see with a casual look.
But, yeah, that's real short life assuming you inflated them properly and drove somewhat normally.