Originally Posted by Luke
The thread is on here somewhere (wont be on the shitter long enough to look) but I was going 5k on Motorcraft synthetic blend. I sent it in for analysis and it had a little life left but was time to change. I have RP 5w-30 in now and am going til 7500 when I'll send it in again to get tested.
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Yea I remember that thread. Please post up results. Im curious.