Chevrolet Silverado 2500 HD excessive engine oil consumption of 1 to 5 quarts between oil changes on Chevrolet Silverado 2500 HD

Some Chevrolet Silverado 2500 HD owners report experiencing excessive engine oil consumption, with usage ranging from 1 to 5 quarts between oil changes. Many drivers have noted oil consumption rates exceeding 1 quart per 1,000 miles, which raises concerns about engine performance and longevity. While General Motors considers 1 quart of oil per 100 gallons of fuel acceptable for heavier vehicles, the relationship between oil and fuel consumption suggests that higher oil usage may indicate underlying issues. Additionally, GM has acknowledged this problem and issued a service bulletin for vehicles with active fuel management systems, recommending the installation of an AFM oil deflector and cleaning of carbon buildup in the cylinder head. It is crucial for owners to monitor oil levels regularly and seek professional assistance if significant oil consumption is observed to ensure proper maintenance and vehicle health.