Quick question guys as I can't seem to find a definitive answer, the old girls about to tick over 100k so I'm planning on treating her to a service but should I continue with 5/40 oil or change to 5/30? I'm sure that I've read somewhere that you need to change to 5/30 when the engine hits 100k because of wear etc.
Final question a lot of you seem to use quantum platinum, however whenever I search on line it seems to be listed as PD oil. Do VW use the same oil for both or is there some petrol specific variant I need to find? I have previously been using castrol but have seen Quantum at good prices.