[quote=Franz More syntzetics of the 70s were AGIP SINT 2000 10w50,
[/quote]
My gap year (1986/7) I worked in a service station, and we held (not sold) Sint 2000...it was $10.50 per litre, in metal 1 litre tins...regular Shell super SF was $7.99 for 4 litres.
I ended up getting a guy with a turbo volvo (neighbour) interested in the stuff after he wasted his second turbo on GTX.
He bought the lot (20ish litres), ran it for 8,000km in his turbo volvo, then ran that through his beaters. Old Datsun 1200s didn't know what hit them,