A question on fuel for a E-450 ford chassis
My neighbour and I both have Jayco Greyhawks on Ford E450 chassis. The same engine, the 6.8L ford engine. He insists on using high octane fuel, probably octane 94. I was considering using octane 87...
Forum Discussion
tatest wrote:
I sometimes buy 89 or higher octane when it is cheaper than 87 octane (a supply and pricing quirk that happens more often than you might imagine), but notice no difference in mileage or performance.
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Anytime I've seen cheaper 89 octane its because its ethanol-blended, while the 87 octane is not. Running empty I see better fuel economy with non-ethanol fuel but when I'm towing heavy its doesn't seem to matter (maybe the higher octane mitigates the efficiency loss?).
