For GCC-spec Audi Q5 models in the UAE, the manufacturer's mandatory requirement is Special 95 (RON 95) petrol. Using a lower octane fuel like E-Plus 91 can cause premature ignition (knocking), which the engine's sensors will counteract by reducing performance and efficiency to prevent damage. While the engine can adapt to Super 98, the performance and fuel economy gains for daily driving in conditions like Dubai-Sharjah traffic are minimal and often do not justify the higher cost per liter.
The most cost-effective choice is consistently using Special 95. Based on current UAE fuel prices (as of 2024) and average annual mileage of 25,000 km for a 2023 Q5 45 TFSI (265 hp, 370 Nm), the 3-year total cost of ownership (TCO) difference is clear:
| Fuel Type | Avg. Fuel Economy | Fuel Cost (3 yrs) | Key Cost Drivers |
|---|
| Special 95 | ~11.2 km/l | ~21,500 AED | Optimized for engine maps; standard maintenance. |
| Super 98 | ~11.5 km/l | ~24,900 AED | Higher fuel cost; negligible residual value boost. |
- Fuel Economy: The real-world difference is typically 0.2-0.4 km/l, heavily dependent on driving style and air-conditioning use.
- Maintenance Cost: No significant difference for standard servicing. However, long-term use of lower-octane fuel can increase carbon deposits.
- Resale Value: According to major used-car platforms in Dubai, service history and GCC specifications impact value far more than the fuel grade used.
Data from the UAE Ministry of Energy and Infrastructure confirms that Special 95 meets the required anti-knock standards for the vast majority of turbocharged engines in the market. Furthermore, advisory from the MOI UAE emphasizes using the manufacturer-recommended fuel as part of regular vehicle maintenance to ensure safety and reliability, especially during summer months when engine temperatures soar. For the typical Q5 owner in Abu Dhabi or Dubai, sticking with Special 95 provides the optimal balance of engine protection, performance, and running costs.
