First of i just want to know some things when off roading.
1. When going through mud is it bad for your car or engine or ect?
Last weekend i went through some mud and puddle. I hit about 25 and the dirt and water went all over , but then i was afraid something was going to happen so i went to the car wash and washed my car and of course it still runs.
2. Doing doughnuts in the snow does that hurt anything?
Cause i live in Colorado i like to mess around doing doghnuts in the parking lot well it is kind of an addiction these days.

I just want to know what the limits i can have off-roading on a 90 4runner that is pretty much stock.