Key Technical Challenges in Electrified Vehicles

Research and development efforts are increasingly focused on technical challenges associated with electrification. These include thermal management of electric motors and batteries, exposure to higher electrical currents, and copper corrosion in electrified drivetrains. Additional formulation demands involve viscosity control, material compatibility, friction management, and durability over extended service intervals.

Although battery electric vehicles and plug-in hybrids currently rely largely on fluids adapted from ICE applications, original equipment manufacturers broadly agree that more specialized lubricants will be required as electrification progresses.

Viscosity and Base Oil Requirements

Across lubricant categories, the trend toward lower viscosity continues, driven by efficiency goals. Lower viscosities improve fuel economy and low-temperature performance but increase volatility and place greater demands on base oil quality. Maintaining performance over the lubricant’s service life increasingly requires higher-quality base stocks such as Group III oils, polyalphaolefins, and esters, effectively reducing reliance on conventional mineral oils.

Electrical Conductivity as a Formulation Variable

Electrical compatibility has emerged as a defining variable for lubricants used in electrified drivetrains. EV power electronics operate at hundreds of volts, introducing risks associated with both excessive conductivity and over-insulation. Excessive conductivity can lead to current leakage and short circuits, while overly insulating fluids may allow static charge buildup and electrical discharge.

Research indicates that conductivity is influenced by viscosity, additive polarity, temperature, and lubricant aging. Additive chemistry and oxidation products often have a greater impact than base oil viscosity alone, reinforcing the need for careful formulation and long-term performance testing.

Copper Corrosion Risks in Electrified Drivetrains

Copper corrosion presents a distinct challenge, particularly where electric motors are integrated into transmissions and copper windings are exposed directly to lubricants. Corrosion can impair electromagnetic performance and generate conductive byproducts capable of bridging insulating gaps.

Reducing sulfur and phosphorus content can improve copper compatibility, but these elements remain central to traditional antiwear chemistry, requiring careful trade-offs. Standard corrosion tests may not fully reflect EV operating conditions, prompting the development of new testing methods that better simulate combined electrical and thermal stresses.

EV-Specific Lubricants: Early but Evolving

Despite rapid growth in EV sales, the impact on lubricant formulations has so far been limited. Dedicated EV lubricants have only begun to emerge since 2018, and most electrified vehicles continue to operate on fluids developed for ICE platforms.

Automakers remain divided on whether current EV-specific lubricants deliver sufficient differentiation. Many OEMs argue that vehicle architectures are still evolving, particularly in fast-moving markets such as China, leaving future lubricant requirements incompletely defined.

Hybrid Vehicles Add Complexity

Hybrid vehicles retain all lubrication requirements of ICE platforms while introducing electric motors that impose more severe operating conditions. Lower engine operating temperatures can reduce additive activation, while intermittent engine operation increases exposure to water and fuel dilution.

Hybrid systems also introduce new material compatibility concerns as electrified components rely on different sealants and construction materials, increasing formulation complexity.

Thermal Management and Cooling Opportunities

Battery electric vehicles eliminate the need for engine oils but still require multiple fluids and greases. Key requirements include thermal management fluids for batteries and transmission fluids for e-axles or electric motors.

As battery energy density and charging speeds increase, thermal management demands are expected to intensify. Automakers are seeking alternatives to air cooling and glycol-water systems that offer improved heat transfer, lower density, longer service life, and reduced maintenance, creating potential opportunities for lubricant suppliers.

Europe: Regulation-Driven Electrification

Europe remains at the forefront of vehicle electrification, supported by regulatory mandates and emissions targets. Electric vehicles already dominate new registrations in Norway, and broader EU adoption is expected as ICE phase-out policies progress. Despite this, Europe’s vehicle fleet will remain mixed for years, sustaining lubricant demand while shifting focus toward higher-performance and EV-specific fluids.

Asia-Pacific: Growth Amid Uneven Electrification

Asia-Pacific combines rapid EV adoption in China, Japan, and South Korea with slower progress across Southeast and South Asia due to infrastructure and affordability constraints. As vehicle ownership expands in emerging economies, ICE and hybrid vehicles are expected to dominate first purchases, supporting continued lubricant demand and positioning the region as a key growth market.

North America: Gradual Transition

In North America, electrification is advancing steadily but unevenly. The United States remains a major EV market, yet ICE and hybrid vehicles dominate the overall fleet. Lubricant demand is expected to shift gradually toward higher-performance and longer-life products as electrification increases.

Outlook for the Lubricant Industry

The 2020s are shaping up as a transitional decade for the lubricant industry. Innovation is accelerating to meet the needs of hybrids, advanced ICE vehicles, and emerging electrified platforms. Growth in emerging markets, evolving vehicle designs, and new technical challenges related to electrical exposure and thermal loads will continue to shape lubricant development priorities in the years ahead