Re: mpg?
Reply #28 –
Yahoo Message Number: 113077
04 Allure 40' Tag, with CRV toad. This is a CAPS era ISL370(Now 400).
Other then in California, we usually maintain 62-64MPH when on a non long day of travel. (Which is about 75% of the time now. If we have a long days travel (Which to us is now 5 1/2 hours or more.), and of course id driving conditions allow, I'll bump the speed up to 65-68MPH range. In California, we usually travel at 60-62MPH, depending upon how many large trucks we have running up our back end:)!.
I had a combo of things going on about two years ago:
-Source Engineering Wax Valve
-ISL had to be reprogrammed, and this time it was with an South American Cummins 400 Program, vs the North American. (Long story, and it is what it is.) I confirmed with the tech, that though 400HP for both programs, but the South American had different curves for HP/Torque then the North American. (HP/Torque came in at lower RPM's, and stated flatter until it reached closer to peak RPM's for both values.)
-Added FASS Fuel Pump, bypassing the Lift Pump, and always feeding positive PSI to the CAPS
-Shifted tires from Michelin XZE* 12R's, to 295/80 Michelin XZA2's
-The coach turned over the 40-45K mark (Now at 65K)
Not sure which of the combinations above, if any, or if it was just the engine finally breaking in. But our MPG over the last say 18-24 months of travel - has moved up to the 7.9 MPG total history. And by math, taking into consideration adjustments for generator hours and HydroHot, we've been between 8.0-8.3MPG. (Wind, mountains, traffic variations, speed, probably accounting for these minor variations.
And none of this really matters to us, as we're going to ravel, and even when we had lower 6.7-7.0MPG travels in earlier years - we were still going to be on the same roadways and trip. Cost of fuel has been a relatively minor cost in the overall ownership of our rig:)!
Best to all,
Smitty
04 Allure 31017
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