budders

thats crazy... 500k? i didnt think they would go any where over 400k

nickmckinney

610,000 mile taxi and the heads are now on a motor making over 500RWHP................

tbirdscwd

DAYUM

nickmckinney

Most taxi heads make the best cores for porting as the ones around here are never cold started and run on 15W40 diesel fleet oil. The heads are always spotless other than the intake ports and all tolerances are still within OEM specs. If they could get the valve seals to last that long the intake ports would be spotless too.

Now a F150 head seems to only last 100,000-200,000 miles and usually the cam bores are damaged by that point. Its all in how it is used and maintained.

richmustang1880

i have 172000 runs great better than my last 3 cars 90000,80000,65000

mbabbitt

610,000 miles on my 2000 mustang engine all original

99 GT vert

My work van has 315k on it burns a little oil but thay is all

Bman2000

105k...lol i only ever payed attention to mine....ive put mileage on the new motor but hasnt made it that far yet, ill let you know if it breaks 100k hahaha

PurpleIcedGT

Jumped into a NYC taxi last week that had 585k on her.

doctorgoo

My 97 gt had 350k when I replaced it last year. After about 330k ran pretty rough. Swapped it with a 2000 gt with about 80k.