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Originally Posted by Chance
Obviously the 6.2L V8 is slightly smaller in displacement than the 6.8L V10, which in itself should help improve MPG on smaller motorhomes. Also of interest is that the newer V8 has much higher compression ratio than old V10, which also supports Ford's claim of improved fuel economy.
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Simply by being a design 10 years newer would achieve some fuel economy savings.
Remember the V-10 was designed when performance/power were more desirable than fuel economy and thus it is thirsty--heck its almost a 20 year old engine! (My first V-10 was a '99 model)
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