My old Series II Landy has a Ford Cortina V6 3L petrol engine, which runs beautifully.
I've been mostly using "Super" that you get from most petrol garages (I think this is a 20W50 grade), but I'm not sure if this is correct for my vehicle.
I have noticed that when the car is still cold the oil pressure is often pretty high - but I think this is cus of the high viscosity of the cold oil
Should I rather be using "multigrade" or a less viscous oil (I think this is maybe a 10w40... I don't a hell of alot to be honest).