Thanks for the links mate.
Interesting to note that the site recommends fully synthetic brands..I've been labouring under the impression that the blended versions were the way to go.
Some of the brands are readily available here and at a very reasonable price. ( Castrol, Valvoline, Mobil)
Because I drive very few miles every year, I change the oils by date and not mileage...about 2500 miles per year or every 6 months regardless.
Cheers