More engine oil again, found in our local Home Bargains.
Fully synthetic for petrol or diesel (not for turbo).
More info here http://viscol.co.uk/main/automotive-range/
They also had the semi-syn for £9.99 for 4.5l (info says for turbo)
"Brilliant oil using in my Volkswagen pd engine for the last 5 years" - thanks bobhope