Well I seafomed my B6 the other day. A bottle in the gas tank, 1/2 bottle in the crankcase, and 1/2 through the intake manifold. Drove around for 20 mins or so, changed the oil, and went to the pump.
I got 543.0 miles out of this tank. I am pretty impressed, I usually have to fill up at 470 or so. BTW I do 20% city and 80% highway driving and have a relatively light foot.
Just thought I'd share.
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