Now the bad news
I found what is likely the source of SOME of my bad gas mileage. I was wondering because I am reading about folks with RV's getting better mileage than me. Anyway, started it up to look for the exhaust leak at manifolds and started smelling gas as usual so I look underneath and fuel is CASCADING down over the motor. Shut her down wit a quickness and pulled the cover off the engine. Turns out the hose for the fuel line is split nearly the entire length...old POS. It pumped about 6 ounces out in the 60 seconds I had it running. At that rate I'm lucky to make it to the next gas station!
Hopefully this turns out to be good news for my mileage.