[young_blood]

I wholeheartedly disagree. I would much rather have some sort of warning than to have the decision made for me. If an indicator in the dash turned on saying "the oil is not the correct viscosity," then I would be able to decide to not run the vehicle.

Imagine you were stranded somewhere and the only option was to use the wrong oil. Sure, it may destroy the vehicle, but at least you would be able to run the vehicle and (hopefully) get to safety before your engine block melts. My issue is when the decision has been made that "you _might_ break it, so we've taken the choice away."

Another example might be, should users not be allowed to install programs on their computer because those programs might interfere with the computer's performance?