I have priced a big tub of mobil 1 at just over £22, i believe my car will take atleast 1 and a half of these, so I'm pretty sure it works out at about £40, although coming to think about it, it does sound quite high. But then again everything is expensive over here. Apart from my car which i bought for £3500. That got me a 1989 300se in black with cream leather with electric heated seats and all the other goodies. It has 130,000 miles, but runs very well, apart from a few minor problems.