Gas Mileage for F150 5.4
Newbie question: I'm trying to get a handle on what to expect for gas mileage. My "new" 2007 Maxlite 23RS will be pulled with my F150 CrewCab 5.4. Is there a rule of thumb as to what to expect? ...
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Ford screwed up when they put in the spark plugs for the 5.4. The plugs fuse themselves to the engine block and need to be forced out which generally breaks them. Then they have to extracted which can cost up to an extra $85/broken plug. I changed mine at 70k and they were fused in there. All but one broke. I was lucky to find a dealer who wouldn't charge me for each extraction. Even then it cost me $465. When they put new ones in they coat the threads with a special compound that prevents that condition. They suggest changing the plugs at 100k. However, in face of what happens I recommend biting the bullet and getting them changed ASAP. You may be in time to get some out without breakage. Too bad Ford doesn't cover the cost of their blunder.
