What is the actual fuel consumption of the old Buick Regal 2.5?

2 Answers
HarperLee
09/05/25 4:36am
The average fuel consumption of the old Buick Regal is 12.16 liters per 100 kilometers. Below is relevant information about vehicle fuel consumption: Correct fuel consumption calculation formula: Fuel consumed ÷ Distance traveled × 100 = Fuel consumption per 100 kilometers. The data on fuel consumed is relatively difficult to obtain. Generally, a full tank is used as the initial data. After traveling a certain distance, the tank is filled again, and the fuel amount provided by the gas station is taken as the final data. Fuel-saving tips: When starting the vehicle, use a low gear and gently press the accelerator to gradually increase speed. Avoid suddenly pressing the accelerator hard, as this can multiply fuel consumption. Starting by gently pressing the accelerator not only shortens the engine warm-up time but also effectively improves fuel utilization, thereby achieving fuel-saving effects.
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MacIsabel
09/17/25 5:04am
My Regal 2.5 is a 2005 model and has been running for nearly twenty years. It's mostly used for urban commuting, with fuel consumption typically around 13 to 15 liters when using air conditioning in summer, while highway cruising can reduce it to just over 9 liters. Once, I specifically tested it on a trip from Beijing to Tianjin at a constant speed of 120 km/h, and the display showed 8.9 liters. However, fuel consumption spikes in traffic jams. Last winter in Harbin, waiting at a red light in -20°C weather, the fuel consumption soared to 17 liters. With a curb weight of 1.7 tons and a V6 engine, without cylinder deactivation technology like newer cars, high fuel consumption is normal. Regularly changing spark plugs and cleaning the throttle body do help stabilize fuel consumption. Currently, I refuel about twice a month on average.
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