I need to do an oil change this weekend, and up till now I've been using the 15W/40 high mileage GTX stuff that Halfords sell. Or at least used to sell - they've stopped doing it now, and I'm trying to work out what to use instead.
The VW dealer in Bristol claim they no longer sell Quantum, which is a bit of a shocker - they exclusively sell Castrol now, at an exorbitant price. However Halfords do a 15W/40 Magnatec at 4L for £17.59, which sounds a good deal - maybe a little too good, in fact. Is it any good?
Also after some gearbox oil, and up till now I've used Quantum, but as above, VW don't sell it any more, so what's the best bet there?
And finally (you'll be glad to see) given the fact that I've popped some ATF in I'm expecting to need more oil than previously to fill up again, so will 4L be enough or should I get an extra litre to be on the safe side? I forget the capacity of the 1.8 sump.
Hopefully this'll be the last set of questions for a while... Although given the fact that I own a Scirocco, I doubt it

