اقتباس:
A distinction is made between unleaded and leaded petrol. All vehicles with petrol engines are equipped with a catalytic converter and must therefore be only driven with unleaded petrol. Unleaded petrol complies with the standard DIN EN 228.
The individual grades of petrol are distinguished by their octane number (RON). Please adopt the following procedure if the grade of petrol which you normally use is not be available in exceptional circumstances.
Engines which need unleaded premium petrol 95 RON can also be run on unleaded regular petrol 91 RON. This does, however, result in a slight loss in performance.
If, in an emergency, the only fuel available is one which has a lower octane number than that required by the engine then only drive at medium engine speeds and lower engine loadings.
You can make unlimited use of fuel which has a higher octane number than that required by the engine. There will, however, be no advantages gained by this in terms of engine performance and fuel consumption!
The handling, performance and life of your engine are determined to a significant extent by the quality of the fuel. Do not use any petrol additives. Use a fuel complying with the standard.