According to the owners manual, the minimum should be RON98 petrol. I think normal unleaded is RON95. Which probably explains the pinking! Think I'll syphon as much as I can into one of my other cars (a Skoda!) then add some booster then stick to Optimax(even though Optimax is enhanced RON 95) . Spose I might give BP Ultimate a bash as the missus works for them!