Well I can't argue with you about the traffic here. After visiting places like Hong Kong, Osaka, Seoul, Las Vegas and California, I've realized that traffic here is really bad and will just get worst at the rate its going. I'd be kidding myself if I expect to get 20mpg out of this truck. But for my application, considering I get up early in the morning to avoid the rush hour and my daily commute is just a short distance, I'd just like to see good fuel efficiency. I mean, people ask about my fuel economy and I tell them I get about 8mpg they ask me if my engine is a 6 or 8 cylinder.

UPDATE:
Adjusted the float by another 1/8 to see how it goes and I did the same run as last weekend. Roughly I can say that the truck did about 15 mpg. For me this is really good.