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Originally Posted by lino
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OK
I just put 2 oz in my 20 gallon 560SL. I very consitantly get 16.2 to 16.6 MPG with the top down. Never cracked 17 with the top down. The weather for next week is good so the top will be down as it was this last week. Last week I got 16.4 MPG.
I will keep you posted, but I'm not expecting the miricle they claim.
John Roncallo