Back a bit Castrol Edge was my good oil and GTX was my budget oil. Now days I more follow that sales and specials, to get any good name brand with good specs at a decent price.
In Australia, the best place to buy a name brand oil at a good everyday price is KMart.
- Shell Helix HX5 15W-40 mineral oil ( API SN, ACEA A3/B3).
- Shell Helix HX7 10W-40 semi-synthetic oil (SN, A3/B4, MB 229.3, VW 502/505)
These two oils are priced so well everyday at KMart, they often beat an Auto store having a sale.
In Oz, KMart and Shell oil will take care of a family on a budget.