If only life were so simple DeanSilverZed said:They buy their oil in dustbin sized cans at much better prices than we can get it and will charge you only for what they use or possibly even a flat rate
You will see from my post above that I was charged £9.07/litre 2 years ago by an indy - and for a full 6.5 litres.
I've yet to get much more than 6 litres back* into ours as well so thats another £5 kerching to the garage.
It is still a useful source of profit for them as they probably pay less than half that for it.
*measure what comes out if you doubt this