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expected mpg volvo d13 w/ishift

I am planning on purchasing a 2014 Volvo 780 with the D-13 engine and I-shift.

I haul trade show/exhibit material and rarely have a gross weight over 65,000#. I do travel the west coast frequently, but try and avoid I-70 and the Northwest.

I am wondering if the XE package with the 455 HP is enough for me or should I get the 500HP. Opinions from dealers have been inconsistent.

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I have a 2013 xe 455 hp. Just finished first trip, sc to ca and return to sc. 77 gross out and 50 on the way back. 7.2 at 64 on cruse. The hill going west on I 40 past Needles 10th gear with the cruse on at 52 mph. Had bad headwinds and freezing rain past ok city brought the mpg down, but that's trucking. I hope for high 7s low 8s after break in .

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I've got a 2010 780 with the VED-13 set at 435 running the I-Shift and 3.21 gears. I run light grossing between 40-55 max, and also run out west. I have had no issues with the low HP. I usually only have to drop to 11th on almost any of the climbs, once in a while coming out of LA I'll drop to 10th. I only run at 56, so I'm at only 1200 rpm at 56, and it will auto shift at about 1050 so it may hold the gears better if your running faster to start with. I don't think you should have much of an issue with the 455HP engine. If everything is running correctly you should get good fuel mileage.

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I just test drove a new truck with those specs and got 7.4 mpg for 4,000 miles are company was happy and ordered 10 new trucks, not bad for a truck that only had 10,000 miles on it, and it will get better when broke in.

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455 will be just fine ....you willsacrfice MPG and drive tires with the higher HP and torque

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Highly disagree. Get the power. My C15 was upgraded from 435 to 600 and the mileage went up 0 -.2 which was not worth it but it is sure fun to drive. Have never ever heard of someone's mileage going down after increasing horsepower unless they are hotdogging.

David I.H. Branded

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Sacrificing tires and mpg is not a given. I have 500 HP Detroit that I have averaged 225,000 miles on steers and gotten around 447,000 miles on wide based drive rubber. And in each case, both steers and drives, the dealer has given me $150 a tire for the old ones. All of them had 8-9/32 tread left and no uneven wear spots. And I haul up to 46,000 lb in the box frequently and do a higher percentage of two lane back roads than most OTR drivers do. And when I go home weekly, about 5 miles of gravel roads, under a load. If HP was going to reduce tire life, I would have seen it.

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You can up the power on that D13 for about $1400 with an adjustable 10% to 40% power gain with a Blixxton Volvo 200. It works well with my D12.

Just a thought if the power isn't enough.

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Those of you running these 2012 and newer 780s with the volvo motor/trans...how has your experience been? the downtime/egr issues etc?

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you can program your ecm for 500bhp. engines are the same (450 and 500).

some dealers will do that for a small fee.

good engines. common problems with air leaks (bolts on intake manifold crack often).

haven't had one, but i was pretty close to purchase one for my fleet.

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