I am saying 5-7 years due to the demand no matter what the cost of oil is. there are a lot of people that want this truck and with it breaking in to the Baja race community like it did, I think the Raptor will be around for a long time. Keeping both the 5.4 and the 6.2L engine in stock, if one goes it will be the 6.2L due to gas mileage. But honestly what is 2-3 mpg dif. between trucks? My opinion is that the 6.3L engine will go away so that it will be that much more special. IMO I think FORD will make the 6.7L in the F-250 and up and the 5.4L will stay with the F-150's. Just my opinion only after all the F-150 is a mid sized truck anyway. People just don't like to admit it but it is, and it is a Badd Arse Truck either way you look at it. Hell it is hanging in there with everything else, why not make the bigger FORD trucks better than everything else? Good job FORD!!!!!!!