I've looked on Castrol's website and it lists Castrol Edge 5W-30 and Castrol Magnatec 10W-40 as suitable engine oil for my 2002 1.0 E Lupo. It's previously been serviced by VW and the paperwork I have lists the engine oil used as VW Platinum Oil and Semi Synthetic Oil. I've also used the oil recommendations on a couple of other websites and only the 5W-30 is given as a suitable oil. I can get the Magnatec 10W-40 (4 Litres) for around £16 from Euro Car Parts and the Edge 5W-30 (4 Litres) for around £29. Should I buy the more expensive oil? Is the 10W-40 actually ok? Which is better? If it helps with a decision I'll be continuing to service the car and change the oil annually. EDIT: After some searching I've also found this http://www.ebay.co.u...4#ht_977wt_1398 which I believe is supposed to be the oil VW use? Should I go with this? EDIT 2: This http://ew5.earlweb.c...rch.php?site=44 recommends Quantum LongLife III 5W-30 and as an alternative Quantum Platinum 5W-40. Is long life worth it if I'm changing the oil every 12 months. I'm pretty lost now, so any help would be massively appreciated