I got over 10,000 miles (started out at around 28,000 miles on it at time of purchase) on my 78K routinely cruseing about 90 miles to and from LA at around 80 - 105 mph...it has just now started leaking. and due to my new found transmission issues, I believe I will be rebuilding both the tranny and the top end)...I basically rev the crap out of it all the time