Ideally, it's whatever product you want, but try regapping the plugs, look for more advanced coil packs and don't over fill the reservoir. I mean been using the autolite plugs but gapped differently, bene using the TRQ coil packs and using the prestone ford recommended coolant. But keeping it at or around the MIn line in the reservoir as if it reaches the max mark, the system shows an error or warning. Van runs better in cooler weather any way. I'm sure the whoosh coil pack would make a good options for you. Oh and high revving engine.. best use the Motul brand oils.