I think SAAB recommends changing oil when the monitor says so but I didn't read it closely enough to see if they also recommend an oil change before the monitor says so if the car is driven under extreme conditions. My guess is that they are not mentioned.
Some say that more frequent oil changes is better for the car and prolongs the life of the car. This is a reasonable opinion.
If you are going to return the car after the lease, following the monitor will almost certainly not result in any noticable wear on the car. If one is a nice guy, I think that an oil change before the first scheduled one in a new car is a good idea. In the old days (even with the classic 900), SAAB recommended an oil change after 1000 miles because of metal shavings leftover when making the engine. For those environmentally conscience, I think worn out engine which is which has to be replaced is bad for the environment, more so than the extra oil that needs to be produced in order to change the oil at the 50% mark on the monitor.
Some say that more frequent oil changes is better for the car and prolongs the life of the car. This is a reasonable opinion.
If you are going to return the car after the lease, following the monitor will almost certainly not result in any noticable wear on the car. If one is a nice guy, I think that an oil change before the first scheduled one in a new car is a good idea. In the old days (even with the classic 900), SAAB recommended an oil change after 1000 miles because of metal shavings leftover when making the engine. For those environmentally conscience, I think worn out engine which is which has to be replaced is bad for the environment, more so than the extra oil that needs to be produced in order to change the oil at the 50% mark on the monitor.