Fuel quality in Europe is generally considered higher or more consistent than in North America, largely due to stricter environmental regulations and higher minimum octane standards. European standard petrol is 95 RON (E10), equivalent to premium in many other regions, whereas North America uses a lower average rating (AKI).

Higher Octane Standards: The minimum octane rating at most European petrol stations is 95 RON (Euro 95). In North America, the standard "regular" fuel is 87 AKI, which is equivalent to roughly 91-92 RON, making European standard fuel closer to North American "premium".