from my experience from working at ford with both general customers n police persuite vehicles u could tell the diffenece in perforamce between the cop cars n the general use car and the only difference between the 2 is the way there driven from birth thrash it from birth it will fly but for wear on the engine best thing to prevent wear is more regular services i know alot of people with commodores now every one knows they have rear main leak issues but the people i know service them every 5000km and they've never had ne problems with them so yeah that my little bit of input