Hello. I have a 1988 Porsche 911 Carrera Coupe with 91,100 miles. I drive the car fast and hard but maintain it extremely well. The valves and seals have been redone at 55K and it only burns a little oil (OK for a 911) and drips just a little - also not a real issue. I always change the oil in Nov and then immediately store the car (Toronto Canada winters) until May and then just drive it without changing the oil again (in May). It has been recommended that this year I try Mobil 1 with SuperSyn™ 0W-40. I'm unsure if this is a wise choice. Would anyone have any thoughts given my car and the year:1988 and milage:91K. Thanks so much, Greg