Antik,
You live in Australia and drive a IS250.
The full synthetic Magnatec 5W30 (SN & A3/B4) would be an excellent oil.
If you wanted more the Edge 5W30 (SL - high zinc, A3/B4, BMW LL-01, MB 229.5) is even better. One of the best oils in the world IMO.
Both are very suitable and both a far cheaper than Amsoil and RedLine.
Just because it's more expensive, hard to find, and only imported in small amounts, doesn't make it a better engineered oil. If you want something super exotic then look at Penrite 10-Tenths Racing, it's 100% PAO and Ester, high zinc and completely shear stable. Yet it's still cheaper than Amsoil or RedLine.
Originally Posted By: SR5
Hi OP,
In Australia, Castrol Magnatec 5W30 "Stop-Start" is a full synthetic oil that is rated API SN and ACEA A3/B4. Our Castrol Edge 5W30 A3/B4 is a full synthetic that is rated API SL and ACEA A3/B4. The Edge also meets many OEM specs like BMW LL-01 and MB 229.5.
If you consult the Castrol Edge PDS
(here)
It clearly states that the Edge meets all the quality requirements of API SN, but is classified as SL due to elevated zinc / Phos levels. This is because under SN rules the Phos levels are restricted for ILSAC grade (20 & 30 weight) oils. The extra Phos comes from the extra ZDDP (zinc) anti-wear agent in the Edge.
The Edge has about 1000 ppm Zinc, while the Magnatec has about 800 ppm Zinc.
To me, this makes the Edge A3/B4 the better product. But I have both at home, and I consider both to be excellent oils.