okie dokie part number is VZGB 115 QLB 00 406 
Eeeek - that part number is for the Quantum Synta - a 10w40 semi-synthetic, at a tenner for 5 litres!!! But what is scary is that it has NO VAG petrol engine approval - so drain that sh!t out and put in some decent lube! 
Isn't quantum oil made by castrol for vw? so how can it not be approved?
Yes, you are correct in that Quantum oils are
made by Castrol - but only for Volkswagen UK - but NOT Volkswagen AG (who are the ones who grant the approvals). Go over to Germany, pop into a Dub stealer, and ask 'em for some Quantum - and they won't have the foggiest clue what you are after. Why do you think that all Quantum stuff has a 'ZGB' part number? They are simply UK specific products. Official Volkswagen lubricants always start with a 'G'.

And whilst Castrol do make it for VW UK, they are NOT the same blends and brews as either the Castrol 'trade' ranges (Castrol Powerflow), or the Castrol 'retail' ranges (GTX, Magnatec, EDGE).
Finally, in order for an oil to gain an official Volkswagen approval, the oil MUST be submitted to Volkswagen AG for their own in-house formal testing procedure - and whilst
some Quantum brews have official VW approvals, not all do, and the last time I checked, neither the new Platinum, nor their LongLife 3 had! Oil companies can NOT 'self-certify' Volkswagen oil standards, unlike they can with API and ACEA standards - yet some do - and Mobil are the worst for this. For a definative and up to date official list of all VW standards approvals, log on to
www.ErWin.Volkswagen.de - you will need to set up a free account before you can download them - but when you do, grab a bottle of say Mobil 1, read what they claim on the reverse of their bottle, and see if they match the official approvals - you will shake your head in disgust!
