Nuke
New member
Since I went to 10,000 mile oil changes on my T4R (8,000 when I'm towing harder than usual) with full syn, I began using the M1 filter mainly for the extended mileage. But I've noticed that a number of the forum members are also running full syn at extended drain intervals using the OEM oil filter. I'm just curious what everyone's thoughts are regarding how many miles you put on the OE oil filter before changing.
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