PSFRED,

I've been driving MB Diesels for 35 years and about 500,000 miles. In that time I had about less than 10 GP go bad. So if I replaced all the GP when one went bad, I would have bought about 45 GP instead of 10 for a difference of 35. At ~$10 each, it would have cost me about $350 more if I replaced all instead of the one that was bad. You may say $350 isn't much, but would you throw $350 out the window? With taxes, that's $500+ in new earned money.

Notice that this is an average of one bad GP every 3.5 years and every 50,000 miles. For something that is not a show stopper and easy to replace, I'm not going to replace a GP until it fails.

I'm not interested in how fast a car goes 0 to 60 MPH, I'm more interested in how fast it goes 0 to 500,000 miles.

As far as the used GP, I was talking about sending the 4 or 5 good ones you replace each time when only one was bad.

P E H