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
Home Skillet wrote:
I was a Ford tech for 25 years.
These engines are designed for low octane fuel.
The high octane fuel is "slower" burning. This will actually create carbon deposits in the combustion chamber.
These carbon deposits will flake off and jam a valve open causing engine damage.
I have seen it happen several times.
X2. I had a 1995 Ford Ranger XLT 4.0L (that had a rear axle recall). In 1995 the service dept at Nashua Ford (Nashua, NH) told me to use regular unleaded and to add a bottle of Gum Out in the fuel tank every 4 or 5 fill-ups or so.
