What grade of gasoline should be used for Audi Q5?
2 Answers
Audi Q5 models are required to use 95-octane gasoline, and it is not recommended to switch to 92-octane gasoline. Using a lower octane fuel may lead to knocking or detonation, resulting in reduced power. Below is relevant information about fueling the Q5: Reasons for using 95-octane gasoline in Audi Q5: The Audi Q5 is equipped with a turbocharged engine, which has higher requirements for gasoline. If a high-compression engine uses low-octane gasoline, it may not withstand the high pressure in the cylinders, leading to knocking. Conversely, if a low-compression engine uses high-octane gasoline, the slower combustion rate may result in incomplete combustion, causing insufficient power and severe carbon buildup. Therefore, the Audi Q5 should use 95-octane gasoline. Gasoline octane rating: The gasoline octane rating represents the fuel's octane number. For example, 92-octane gasoline consists of approximately 92% isooctane and 8% heptane. Since isooctane has better anti-knock properties while heptane has poorer anti-knock properties, a higher octane rating indicates better anti-knock performance of the gasoline.
I used to drive a 2019 Audi Q5, which generally requires 95 or 98 octane gasoline. To be honest, when I first bought the car, I thought using cheaper 92 octane would save me some money on fuel. However, after filling up twice, I noticed the engine started shaking badly and lacked power. The 4S shop later explained that Audi's high-compression engines must use higher-octane fuel—95 is the minimum, while 98 helps better prevent knocking and protects those precision components. Especially in city traffic jams, lower-octane fuel can worsen carbon buildup, and repairs can be quite costly. Using 92 octane might work in an emergency, but long-term use really damages the car—the maintenance manual clearly states 95+ is required. Now, I always stick to official Sinopec stations and fill up with 95 octane for peace of mind.
