Peugeot 308 1.6vti sport oil type

[mookev]

As I am sure we are all aware, the engine in the above car uses oil at the rate of around 1 litre per 1500 miles. The same engine is found in minis and I believe some citroens. My 308 1.6vti was serviced before purchase using Mobil 1 5w30 ESP, an excellent oil but also expensive at £17.99 litre. I therefore intend to change the oil in the not too distant future and have previously always used comma synthetic in other cars and indeed my wife's 206cc. I am tempted by comma protech 5w/30 which is specially developed for these Peugeot/citroen engines but is not specifically approved by psa. It is fully synthetic and retails at £21 per 5 litres or £6 litre! Is anyone running this oil in there car or alternatively, which oil are you using please?