The lawnmower brand that is generally considered more fuel-efficient is Husqvarna. Husqvarna lawnmowers are known for their advanced engine technology and efficient design, which contributes to lower fuel consumption compared to other brands. According to a study by Consumer Reports, Husqvarna lawnmowers require less fuel per hour of operation than many of their competitors. This efficiency is achieved through features such as their X-Torq engines, which provide the same power as larger engines while using up to 20% less fuel and reducing exhaust emissions by up to 60%. The data from Consumer Reports, a highly respected consumer publication, supports the claim that Husqvarna lawnmowers are more fuel-efficient, making them a popular choice for environmentally conscious and budget-conscious consumers.