In my previous life, the company I worked for had about 4000 cars. Their policy was 4 years of 40000 miles, no matter what. I was told that
1. Our time was too valuable to be wasting it taking to the shop.
2. After 40000 miles it would start needing tires, batteries, breakes, etc. Too much time and money.
3. Image - we represented the company image. (and had to keep it washed weekly, etc.
There was a period of time when I was putting 40,000 miles on my car every 9 months. So every second or third car I bought from the company for my wife to drive, depending on how reliable it was.
Here in Bolivia people keep asking me to sell them my 99 4Runner and 2002 HiLux pickup, but I prefer to keep them. both have 100,000 km on them, both are as good as the day they were delivered (with 1 to 5 ppm of iron in UOA). Since I depend on these two to take me to remote mountains and swamps, I'd replace them in a minute if they became unreliable.
I had one Toyota engine rebuilt at 600,000, but regret it. Much of the rest has since fallen apart from metal fatigue.
I had my 95 4Runner rebuilt at 100,000 km after I recovered it from the river. Doing well at 300,000.
So there are a lot of factors.
1. Our time was too valuable to be wasting it taking to the shop.
2. After 40000 miles it would start needing tires, batteries, breakes, etc. Too much time and money.
3. Image - we represented the company image. (and had to keep it washed weekly, etc.
There was a period of time when I was putting 40,000 miles on my car every 9 months. So every second or third car I bought from the company for my wife to drive, depending on how reliable it was.
Here in Bolivia people keep asking me to sell them my 99 4Runner and 2002 HiLux pickup, but I prefer to keep them. both have 100,000 km on them, both are as good as the day they were delivered (with 1 to 5 ppm of iron in UOA). Since I depend on these two to take me to remote mountains and swamps, I'd replace them in a minute if they became unreliable.
I had one Toyota engine rebuilt at 600,000, but regret it. Much of the rest has since fallen apart from metal fatigue.
I had my 95 4Runner rebuilt at 100,000 km after I recovered it from the river. Doing well at 300,000.
So there are a lot of factors.