H3AD-HUNT3R:
SORRY I MADE A MISTAKE, IT'S NOT 10X330 IT'S 15X330,
Take's me a while to wake up in the morning
So in fact, this Asda deal works out a lot better than the 3 for £20 deal at Tesco. (Obviously though, the previous posters were basing their sums on the original information given.)
Tesco = 15.336 litres for £20 = £1.30 per litre / 74p per pint.
Asda = 19.8 litres for £20 = £1.01 per pint / 57p per pint.
Mind you, while you will be able to buy just £5 worth to cash in on the Asda offer, it might not be easy to bulk buy, as they often have restrictions in place.
ClashInDevon