OK, I've decided on this product for now after reading many threads. And, Wally World has it here for $1.50 a bottle for 32oz. The bottle says good for up to 100 gallons of fuel and to dump the WHOLE bottle in the tank. It doesn't give any mixing instructions for other quantities. Since my tank is only 26 gallons, shouldn't I only use 1/4 of the bottle at a time?