Mid-Grade Gasoline is a refined petroleum fuel engineered to deliver an optimal balance between performance, efficiency, and cost. Positioned between regular and premium gasoline, it is designed for engines that require moderate octane levels to prevent knocking while maintaining smooth combustion under varied driving and load conditions.
This fuel grade is commonly produced by blending regular gasoline with premium gasoline or through controlled refinery octane enhancement processes, ensuring consistent quality and compliance with international fuel standards.
Chemical Composition & Refining Characteristics
Paraffins (alkanes) for stable combustion
Isoparaffins to improve octane rating and smooth engine operation
Olefins to enhance volatility and ignition quality
Controlled aromatic content for octane strength
Low sulphur and impurity levels
Refining Processes Involved
Catalytic reforming to enhance octane quality
Isomerization for improved volatility and cold-start performance
Alkylation to produce clean-burning, high-octane components
Hydrotreating to reduce sulphur and impurities
Combustion & Engine Performance
Superior knock resistance compared to regular gasoline
Suitable for moderate compression engines and heavy traffic conditions
Smooth throttle response and reduced pinging during acceleration
Improved torque consistency and drivability
Fuel Efficiency
Better fuel economy than regular gasoline in engines tuned for mid-range octane
Prevents efficiency loss caused by knock-induced ignition retard
Emissions & Environmental Impact
Lower unburned hydrocarbons and carbon monoxide emissions
Improved compatibility with catalytic converters
Reduced engine deposit formation extending emission system life
Supports ethanol blending (E5–E10 where permitted) for cleaner combustion
Compatibility & Engine Suitability
Recommended for passenger cars requiring 89–90 octane
SUVs, crossovers, and light commercial vehicles
Two-wheelers with higher compression engines
Fleet vehicles prioritizing balanced performance and operating cost
Storage, Handling & Safety
Stored in approved steel tanks or lined containers
Highly flammable liquid requiring proper grounding and ventilation
Typical shelf life of 3–6 months under proper storage conditions
Quality & Industry Standards
ASTM D4814 (USA)
EN 228 (Europe)
IS 2796 (India – blending specifications)
BS-VI / Euro-VI emission compatibility
Commercial & Trading Advantages
Cost-effective alternative to premium gasoline
High demand in urban and semi-urban markets
Suitable for bulk trading, retail distribution, and export
Stable supply chain due to blending flexibility