The tires on the passenger side both front and rear of my Mazda 3 are wearing out at a faster rate than the driver side tires. All tires are wearing evenly, just that the passenger tires are wearing faster. I had an alignment when I bought the current tires, around 15k miles ago, never hit anything. The passenger side tires are at the wear indicators while the driver side has about 1/3 life left. Any idea why this would happen? Thinking of my driving routines, most of my turning are left hand turns.