I should clarify:
The 1st was done at an AR main dealer, the 2nd at a Fiat main dealer (same dealership chain). Oil on 1st receipt described as Selenia WR PE 2LT, QTY = 3, unit price = £17.40, net total = £52.20. Oil on 2nd receipt described as WR Pure energy 5LTS, QTY = 1, unit price = £42.50, net total = £42.50. Therefore 1st oil = £8.70/litre, 2nd oil = £8.50/litre.
There's no more info on the receipts on the labour costs.
And to clarify further... my post was not a moan.