What type of gasoline should be used for Audi A4L?

[LaEsther]

Audi A4L requires the use of 95-octane or higher gasoline. Below is an extended introduction about gasoline: Composition of 95-octane gasoline: 95-octane gasoline consists of 95% isooctane and 5% n-heptane. High-compression engines should use high-octane gasoline. If low-octane gasoline is used in a high-compression engine, it may cause abnormal combustion, resulting in knocking, increased fuel consumption, and reduced driving power. Refueling precautions: High-compression engines can use low-octane gasoline, but one should not blindly choose gasoline based solely on compression ratio. Instead, the manufacturer's recommended gasoline grade should be followed.

[DelAndrew]

Over the years of driving my Audi A4L, I've experimented with different fuel grades. The fuel filler cap clearly states '98 recommended, 95 minimum,' so 95 is the lowest acceptable grade. Once, I had to temporarily use 92, and the engine immediately triggered a warning. The dealership explained that lower-grade fuel can cause knocking in turbocharged engines, potentially damaging the pistons. Long-term use of 92 may also clog fuel injectors, with repairs costing thousands. While 98 is indeed more expensive, the power delivery is noticeably smoother on highways, and the cost difference per kilometer is just a few cents. As a side note, avoid mixing different fuel grades—I consistently use Sinopec 98, and after three years, the car's condition remains excellent.

[DiJoel]

I'm in the auto parts business and have handled many A4L cases. The EA888 engine in this car has a high compression ratio, so 95-octane fuel is generally sufficient, but there might be occasional slight knocking sounds when the turbo kicks in. One customer opted for cheaper 92-octane fuel long-term, and by 30,000 kilometers, the engine started misfiring and shaking—it was only resolved after cleaning the fuel injectors and throttle body. 98-octane fuel has higher anti-knock properties due to its higher octane rating, which is especially protective when running the AC or climbing hills in summer. Of course, during periods of high fuel prices, 95-octane is acceptable, but always refuel at reputable major gas stations, as smaller stations often have lower-quality fuel with more impurities that can lead to carbon buildup. Before filling up, it's wise to check for discounts on fuel apps—every bit of savings counts.

[VonRiley]

When neighbor Lao Wang first got his A4L, he kept asking what fuel to use. Page 37 of the manual clearly states: 95 or above is mandatory. With 20 years of driving experience, I recommend 95 for city commuting. But if you frequently drive on highways or enjoy flooring the accelerator, 98 can improve power response. Never listen to those who suggest using 92 - it may trigger the engine warning light. Fuel choice affects spark plug lifespan; I've seen cases where spark plugs needed replacement at just 60,000 km. A full tank should show around 620 km of range to be considered normal.