Join Date: Mar 2014
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I don't know the MPGs on the 15s, but I'm sure Blwnsmoke will let you know how his is doing. I think its a matter of how healthy your wallet is. If money is no object go for the 2015 as I'm sure you won't be let down with the power and improvements. The 2014s can be had at a discount due to the release of the 15s. Its up to you, good luck with whatever you decide.
Ordered Sept 26: 2017 F350 CCSB Lariat Ultimate 6.7
2002 F250 ECLB, XLT, 7.3 PSD, 4X4, Auto, TW 6pos. Tuner, 4" SS Exhaust, Britebox, EZ Down tailgate assist, Rear Air Bags, 6.0 trans cooler, Wicked Wheel 2, Corey's HPX, Dieselsite Water pump w/built-in filter, 203 degree thermostat, Max A/C assist, Oil drain valve, Non EBV pedestal & Flange, S.S. bellowed up pipes, Dieselsite Lifetime Rad. hoses & Intercooler hoses, New oil cooler, CTS Insight monitor,