I'm with Deejay, Castrol Transmax is a remarkable oil and I really can say you will notice the difference!
I use the Transmax in the gearbox too, The one with the smooth drive technology. There are several different Transmax variants so make sure you are selecting the correct one.
Ebay is a good selection tool and will get you a good price, Opie oils stock it and deliver quickly at a mid price level.
In the engine I use Millars motor oil CFS 5W 40 NT+ This is competition fully synthetic nano technology + This is the oil of choice for the racing guys and its probably the most popular oil used at thr circuits as it exceeds most premium hi spec oils and is fairly competitive with them in price.
You may have to select your own grade ie. 5W 40 is for my Duratec engine but the rest holds true across the range.
I'm afraid oils/lubricants are a little like tyres, just because your car was supplied with continental tyres doesn't make them the best choice yet most of us replace with the same!
Oil technology moves on and I have found these to be better than I could have dreamed of, you will feel the difference, Promise!
