"High mileage oil isn't snake oil - but it's not magic either. Carquest expert breaks it down: seal conditioners prevent leaks, thicker viscosity compensates for worn tolerances. But it won't resurrect a dead engine or fix major problems. 🔧 Smart mechanics know this is about condition, not just age. Good bones with tired seals? High mileage helps. Blown rings and worn bearings? You need more than oil. Real expertise means honest recommendations, not just product pushing. At what mileage do you make the switch? Drop your number below and tag someone who works on older rides! 🚗 #CarquestAutoParts #HighMileageOil #ExpertAdvice #AutomotiveParts #MechanicLife #AutoRepair #EngineProtection #ProfessionalMechanic #CarCare #AutomotiveExpert #GearheadLife #AutoShop #OilEducation #HighMileageVehicles #AutoMaintenance"