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dexter860

Mack MP7 vs E7 350?

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Just bought another truck , 2014 small sleeper Mack with mp7 an M drive , still  have my 95 small sleeper with E7 350 and 4:17 rears , it is getting 6.7 to 6.8 pulling a flatbed mainly in Ohio . I'm hoping this new truck gets better mpg but bobtailing home empty the gauge seemed to move more than I expected. Is it reasonable to expect to outperform the 95 on fuel economy, or not? If this thing burns more fuel it will probably  be finding another home. The 95 has been a very economical truck to operate.

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The E7 wasn't hampered with as much pollution crap like the M-7. The e-6 and E-7 was about as efficient as you could get in a small block.

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Keep that 95 you'll be glad you did. If any mpg gain at all, the added maintenance cost will offset the difference. On a 99 etech 460 with 4.42 were seeing 6.1-6.3 avg running PA/NJ doing the speed limit. Around 7.3 with the 93 avg 60k loads

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There is no comparison.... your "Volvo" has B.S. controlling fuel going in... and exhaust. coming out... The E-7, may be slow.. but its deliberate.. Keep it running as long as you can.. Hell, if the exhaust system gives you a problem, you will be able to smell it, and see it... Without the High repair cost, and having to explain why you cant do a re-gen to a tech.... Anyway... I

m just having fun here... Go Bulldog!! Jojo

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On the 93 350 after doing an inframe, blixxton, turbo & injectors we saw roughly 1-1.5 mpg gain

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