Hi done a bit of digging, think this pretty much clears it up, this is Petronas euro reply:
Thanks for your enquiry.
There are two options for 10W-60 oils.
70161 SELENIA RACING 10W-60
70000 PETRONAS SYNTIUM RACER 10W-60
You can find them on eBay, Opie oils etc.
Both oils are fine for your car. The oils viscosity at 100°C are almost identical (23 cSt) The Syntium Racer 10W-60 has a superior viscosity index, which means it offers better performance at higher temperatures.
Kind regards,
"PETRONAS Syntium Racer 10W-60 is a fully synthetic lubricant developed with °CoolTech™ technology that effectively controls the heat, resisting oxidation and preventing oil degradation and deposit build up, to protect parts and maintain engine efficiency for the full drain interval. PETRONAS Syntium Racer 10W-60 especially designed for all types of high-powered racing engines, passenger cars including gasoline and diesel engines and latest high-performance cars fitted with fuel injections, multi-valves, turbochargers or superchargers operating under most severe conditions"