The Canada Customer Service Index–Long-Term Study measures service usage and satisfaction of owners with vehicles that are 4-12 years old and analyzes the customer experience of both warranty and non-warranty services. The 2025 study survey conducted from March through June, surveyed nearly 10,000 vehicle owners and ranked Great Canadian Oil Change highest with a score of 830 on a 1,000-point scale. LEXINGTON, Ky.--(BUSINESS WIRE)--Valvoline Inc. (NYSE: VVV), the quick, easy, trusted provider of preventive ...