The recommended oil type for a 2008 Ford E-250 van depends on the engine it has. Ford E-250 vans from that year came with several different engine options (gasoline V8s and possibly a diesel V8).
You absolutely MUST check your owner's manual. It will specify the correct oil type (weight and type – synthetic, conventional, etc.) and the capacity.
Looking for a sticker under the hood might also give you a clue, but the owner's manual is the definitive source. Using the wrong oil can seriously damage your engine.
