What's the real capacity

[fyrertuck]

In reading the spec page of my owners manual, it states the fuel tank capacity is 6.6 gallons. I got curious about that during my last outing and wondered about the actual useable capacity. With the filler neck located on the front left corner in what appears to be a position lower than some protions of the tank - how much fuel can I actually get onboard? I think the "design" capacity may be 6.6 gallons, but the actual useable capacity is less than that. Can somebody set me straight. Since I compute distance between fill ups using the trip meter and average MPG, would be nice to know how much actual fuel I am carrying. Dumb question? probably. So, clue me in. Thanks.

Well I can tell you one thing I did.

I replaced the fuel line / from the tank to the canister. I run the fuel line up the left side, then up and over / next to the air cleaner box and then back to the canister. Yes I did put the fuel line in a plastic sleeve from the auto store. This lets me put more fuel in without the fuel smell. 5.0 to 5.5 gal

Now I have a small orange funnel that I cut a small amount off the end so it fit under the seat by the filler neck. This helps me fill faster and get more it.

Next if I just could back off the throttle I would have better MPG or should I just drop some weight???:banghead: