I even wear them to change the oil now. I used to always have stuff falling in my eys while working on any of my cars. until recently I never wore safety glasses. The last time I was working on the Z I had hot oil spray right on them directly over the center of my eye. I'm glad I decided to start wearing them before that happened. but seriously it just makes sense. I really don't want a severe eye injury over something stupid like working on my car or using a lawn trimmer.