Why not use it if it's available? I drive my muscle cars for the muscle as well, but the time I actually USE that aspect of the car is MAYBE 1% of the time, being very generous. Granted, the time that I might be in the right parameters to engage the MDS might not be very frequent either, but I'd wager that it would be more often than WOT. I'd personally hate to leave any economy on the table, for those times that I'm driving to an autocross event, or cruising with my family out to the lake with the top down. If there's some reason that it renders the salvage engine inop, that's one thing, but I can't imagine that's the case.

Clair