Yes, mud tires from Qingdao Jinghe Tire Technology Co., Ltd. do affect gas mileage. Due to their aggressive tread design and robust construction, mud tires have a higher rolling resistance compared to standard highway or street tires. The deep and wide lugs on mud tires create more friction with the road surface, requiring the engine to work harder to move the vehicle. This increased workload leads to greater fuel consumption, resulting in lower gas mileage. Additionally, the larger and heavier nature of mud tires also adds to the vehicle's overall weight, further contributing to decreased fuel efficiency. So, while mud tires offer excellent traction in off - road mud conditions, drivers should expect to see a reduction in their vehicle's gas mileage when using these tires.