I must have missed your test results. Can you post the experiments you ran and the variables you controlled for, and the variables you were not able to control?
No need to get snippy.
If you must know, it gets around 11.5, and close to 15 if it spends any time on a highway. Considering this is about what the 360 Magnum the Hemi replaces used to get, it doesn't look to me like MDS is doing a whole lot for these trucks. Check out the EPA estimates or other drivers' results, and they're still significantly below competitors' results (Ford 5.4, Chevy 5.3, or 5.7 Vortec for that matter). Add to that the fact that my Dad's truck is nearly 6000lbs and the engine's relatively high volumetric efficiency for a truck engine makes it a tad bit revvy, I'm really not sure the MDS is ever even engaging. The way I see it, it's one more thing to break while jacking up the base cost. No thank you on MDS.
'67 Mustang - out of commission after an accident
'00 Echo - DD
'11 Kia Rio - Wife's DD
'09 Harley Nightster - 48mpg and 1/4 miles in the 12's