Ok...supposely the TTZ has a 18.7 or 19 (depending on what you read) gallon tank. Uhm...is this true? The MOST I've been able to fill up was 14.7 gallons. And I spilled a little (doh!). I drove around about 5 miles on my red gas light. My Merkur has a 16 gallon tank and I most I could do 14.4 gallons. Also, about how long can you go with the gas light on?