And like a few thing on their site, I don't believe it to be completely accurate (for our injectors anyway). I've examined four failed injectors and did not find that to be a cause of failure in any of them. What I did find is what I found in my write-up. However, like you stated, I do believe that how often you drive the car has a lot to do with it. That acually adds to the confirmation of how they (our injectors) fail according to my write-up.