In case of petrol, an additional premium fuel with Research Octane Number (RON) 95 is proposed while the cetane number for diesel would stay the same (51).
Researchers in China have generated gasoline fuel with a research octane number of 95.4 from biomass - derived γ - valerolactone (GVL)-- the highest octane number reported for biomass - derived gasoline fuel — using an ionic liquid catalyst.