I like to keep it clean. I change it every 3000. But if you don't drive it hard you can wait as long as 7000 without doing any harm.
And I imagine that you already know to over-fill the Duratec by .5 to 1.0qt because of starvation on right hand turns.
00 CSVT Black/Midnight Blue
2.5L DOHC Duratec V6, 200HP, MTX-75
MODs: K&N Filter, SVT ovals, Autometer gauges, PIAA 510's, Alpine S-type FE/Pioneer R, Pioneer Premier Series reciever
#603 of 2150
92 Cavalier 1.8L I4 (Beater)
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