2.0L TDI A6 - Oil question
Hi folks, i'm a newbie here and have a question regarding engine oil.
My car has just turned 5k miles and the low oil warning indicator came on. I've topped the engine up with a litre of oil supplied with the car and have now set about buying a replacement supply of oil for future use (either 1L or a 4L if more economical).
My local Audi dealer recommended Castrol SLX Longlife II (0W - 30) (as that's what is apparently in it already) but at £12.29 (inc Vat) per litre then it's not cheap. My local Halfords shop have suggested that Castrol Edge is the new replacement to the SLX Longlife however it's £13.99 for a litre.
Does anyone have any experience they could share with me as to: -
1. The best (cheapest) place to buy SLX Longlife II
2. Using Castrol Edge as an alternative product
3. And if using Edge - can this be used to top my engine up now without resorting to having to have a full oil and filter change before doing so.