I don't think it really has to do with what is or isn't selling, it's about aligning company resources for future profits. If they are thinking of putting a 4-cyl in the 4Runner, it would not make sense to have three engine choices especially considering the weight difference. Unfortunately if they are considering replacing the fully-boxed frame with a unibody type design, the V8 doesn't make much sense. If you reduce the weight by topping this out with a V6 you save 200+ pounds. If you further reduce the weight by removing the steel frame and moving to a unibody design, you are saving 300+ lbs. Some aluminum panels, composite here and there, and the 4Runner could potentially shave 1000 lbs from it's heaviest design to date. I don't have any inside knowledge, but I know most companies, auto manufacturing for one, are being pushed to go green, and getting tax incentives for doing so. Reducing the weight, emissions, and increasing fuel economy have a way of also lining the pockets of the board and the investors.