LSI Posted May 28, 2012 Share Posted May 28, 2012 What fuel mileage can I expect from a "13" Pinnical with 505hp,1760ftlb,3;58 rears,13spd,pulling van with a soft foot and driving 62mph? Quote Link to comment Share on other sites More sharing options...
Mackpro Posted May 29, 2012 Share Posted May 29, 2012 I have seen alot that average 6.9MPG with and without wind farings. Keeping the MPH down is the key. None were equipped with a 13 speed though , Here we rarely see a 13 , 15 or 18 speed trans anymore unless in a GU. Quote Link to comment Share on other sites More sharing options...
LSI Posted May 31, 2012 Author Share Posted May 31, 2012 J&M in Quincy IL and I believe Jacobson in DeMoines Ia has 13spds.Sharkey is trying out the 13spd in their tanker fleet. Quote Link to comment Share on other sites More sharing options...
Dzlbudman Posted May 31, 2012 Share Posted May 31, 2012 You should see right around 7mpg. 1600 is the sweet spot on the 505hp engine. Also watch for the $$ sign on the dash. Quote Link to comment Share on other sites More sharing options...
LSI Posted June 4, 2012 Author Share Posted June 4, 2012 J&M in Quincy IL and I believe Jacobson in DeMoines Ia has 13spds.Sharkey is trying out the 13spd in their tanker fleet.I talked with Housby Mack in DesMoines Ia.He said Jacobson's trucks were 455's,60" sleeper,13spd and 3:25 rears. Quote Link to comment Share on other sites More sharing options...
Mackpro Posted June 6, 2012 Share Posted June 6, 2012 My buddies 2012 CHU daycab with no fairings, 505 HP, Mack 10 speed trans, rear gears are in the 3.40 range ( cant remember) just pulled a loaded van back and forth to StLouis at 68 MPH and he got 6.8 MPG. Boss man said he heard of MP-8's with super high rear gears running 13 speed trans and mostly running in 12 th gear but on flat ground going to 13th gear and the engine RPM dropping to 1100 RPM and getting some unheard of MPG. Not saying its true but thats what I heard. Quote Link to comment Share on other sites More sharing options...
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