My new Series 50, 4.11 geared "RTS" got 10.75 mpg in short test yesterday

[Geoff]

If I could keep my speed down to 56 mph in my RTS,  I'm sure I could get 10 mpg.  But I can go 80.

[neoneddy]

I puttered along this winter  around 63 for 120 miles each way.  Got 6.7 mpg or so... was kind a bummed.   Winter fuel?

[Oonrahnjay]

I puttered along this winter  around 63 for 120 miles each way.  Got 6.7 mpg or so... was kind a bummed.   Winter fuel?  [\quote]

     Yeah, winter fuel surely doesn't help.  But just about everything is against us in the winter -- very small things like tire flexibility, lubricant viscosity, even air drag all build up to make a difference.  Winter fuel is blended to a formula that's set by the petro companies -- it's based on month of the year and location; the November fuel baseline in Florida very different from that in Minnesota and, of course, the baseline in Minnesota is lower in February than Florida.  (And California rules make it impossible to buy anything but the most expensive fuel.)  Add to that the the refiners/distributors/jobbers have to be sure that there's a margin plus they take every advantage to cheapen their fuel in the process, even if it makes for poorer fuel consumption.
      You might want to try that run again when it's 82 degrees out and see if it makes a difference.  (My guess is that you'll see an effect, just not a lot.)

[buswarrior]

I puttered along this winter  around 63 for 120 miles each way.  Got 6.7 mpg or so... was kind a bummed.   Winter fuel?

How did you measure this fuel economy?

120 miles each way? How many trips to the pump?

One extra pull on the pump handle changes the calculation by how much?

Don't beat up the coach or the fuel if the scientific methods are suspect?

happy coaching!
buswarrior

[windtrader]

How did you measure this fuel economy?

120 miles each way? How many trips to the pump?

One extra pull on the pump handle changes the calculation by how much?

Don't beat up the coach or the fuel if the scientific methods are suspect?

happy coaching!
buswarrior

I kind of wondered the same thing. It dawned on me it is quite difficult to get an accurate MPG calc off my MC8, particularly when running the generator that is connected to the primary engine fuel supply. The upside is I'm likely getting better mpg than I had calculated. Net net though as the credit card seems the same amount. LOL