They are probably both OK but only way to say for sure is to check for specifications on the can to see if and which VW specifications it meets. I think AQH engine need 501 01, 502 00 spec oil .At £25 why not go for Quantum oil which is the official VW oil:
http://www.ebay.co.uk/itm/GENUINE-VW...AAAOSw5VFWFlGu
or
http://www.ebay.co.uk/itm/Quantum-Lo...0AAOSwJkJWl8iL
As for 5W30 or 5W40 are only a numbers for representative oil viscosity and does not necessarily say which is better oil. For one thing I would say that bigger difference between 2 numbers is better for example 5W40 is better then 20W30. There has been a push for thinner oils like 5w30 or 0w30 as they being thinner mean lower fuel oil consumption and less CO2 that manufactures can put on spec sheet but often at cost of other properties.
There is a nice comparison tool here where you can compare different specification oils and their different properties: https://online.lubrizol.com/relperftool/pc.html
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
Last edited by ainarssems; 17th May 2016 at 10:00 AM.
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