Actually the 4.0 SOHC V6 is not a descendant of my engine , my Ford Capri has the 3 Liter British made Essex engine family V6 , The 4.0 Would be a Cologne family engine, and no i don't do a lot of short tripping with it, most of the times i take it out i do long drives where the engine gets up to temp, i'll try to find a good synthetic filter though