09-03-2023, 11:22 AM
I seem to be using 5/30 fully synthetic at the moment (I was given several containers full) and the car has never run better. I have been using 10/40 synthetic previously for some time with no issues. I have always used what is easily available over the last 50 odd years. Same goes for petrol where I use the cheapest, usually supermarket. Currently using Jet as this is the cheapest local station.