Circle K's La Mesa Boulevard location pumps 76-brand TOP TIER gasoline in regular, midgrade, and premium grades at the intersection marking the eastern approach to the Casa de Oro commercial strip. The 76 fuel system's ProClean formula targets intake-valve and combustion-chamber deposits using the same automaker-backed additive standards that inform engine maintenance at C & D Auto Care on nearby University Avenue. Alimentation Couche-Tard, the Canadian parent company that acquired Circle K in 2003, now operates the convenience-store brand in 27 countries, making it the largest non-franchised convenience chain in the United States. All three octane grades carry identical TOP TIER-level detergent concentrations, a fuel-quality commitment that aligns with the paint-protection and ceramic-coating standards maintained by Neighborhood Mobile Detailing for vehicles throughout La Mesa's 91941 ZIP. 76-brand fuel meets the TOP TIER intake-valve deposit threshold of 50 mg maximum average under ASTM D 6201 while prohibiting metallic additives such as methylcyclopentadienyl manganese tricarbonyl that accelerate catalytic-converter poisoning in modern three-way catalyst systems.