Extended drain intervals raise chemistry demand per litre
Passenger car drain intervals have stretched past 25,000 kilometres in several markets from roughly 5,000 twenty years ago, which means the same volume of oil has to survive four or five times the thermal and oxidative stress it once did. That requires substantially more antioxidant, dispersant and detergent chemistry per litre rather than merely better chemistry. Treat rates now average around 12% and rise with each specification upgrade. The commercial consequence is counterintuitive and important: additive tonnage grows even as finished lubricant volume falls, which is why this market has held up against a shrinking host.
Market Impact: Renews demand every 8 years








