At Tomoil, the base oil is considered the backbone of every lubricant formulation. It forms the structural framework in which additives operate and determines the oil’s fundamental properties.

At Tomoil, the base oil is considered the backbone of every lubricant formulation. It forms the structural framework in which additives operate and determines the oil’s fundamental properties.

Base oils influence critical factors such as viscosity index, volatility, oxidation stability, and friction behavior. These properties affect cold-start performance, thermal resistance, oil consumption, and overall wear protection. Even with advanced additive packages, the performance limits of a lubricant are set by its base oil.

API base oil groups provide a standardized classification system. Mineral oils from Groups I to III vary in refinement level and purity, while synthetic base oils from Groups IV and V offer engineered molecular structures for enhanced performance. Tomoil selects base oil types according to application demands, ensuring balanced lubrication, long-term stability, and reliable operation under varying conditions.

Tomoil develops its lubricants using a broad spectrum of base oil groups, from advanced mineral oils to full synthetic technologies.

1. Group I and II base oils are used in conventional and commercial applications where durability and cost efficiency are essential.
2. Group III hydrocracked base oils power Tomoil’s synthetic-technology products, offering high stability and excellent engine cleanliness.
3. Group IV and V base oils are applied in fully synthetic formulations to ensure top-level performance under extreme temperatures and loads.

This multi-tiered base oil strategy allows Tomoil to serve both mass-market and high-performance segments effectively.

Beyond internal production, Tomoil operates with strategic access to premium base oil sources, enabling the use of multiple API base oil groups tailored to different performance levels and applications.

This direct sourcing model provides Tomoil with flexibility in formulation, reliable supply security, and effective cost management. As a result, the brand can deliver competitively positioned lubricants that combine consistent quality, strong performance, and global market readiness without sacrificing reliability.