Now that my engine is broken in with over 1,900 miles and an oil change, I run my first tow after picking up my new RV (a 24' travel trailer weighing about 5,000 empty). I also conduct an impromptu MPG test to see how the new 6.6L L8T gas engine with 10-speed Allison transmission performs while towing. If you didn't catch my unladen MPG run, check out this video here:
   • I Try Again...Highway MPG Test with M...  

00:00 Intro
02:38 Initial Impressions
05:43 Check Trailer Wiring Error
06:36 Why I Chose a 3/4 Ton Gas Truck
08:52 Tow/Haul Mode
10:55 Error Message
11:57 MPG Results
13:10 Conclusion

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