Keeping India's Wind Fleet Turning: How Mobil™ is Making Smarter Turbine Maintenance a Reality
India's wind fleet is maturing rapidly, and with that comes a shift in priorities. The conversation is no longer just about adding capacity – it is about protecting the investment already in the ground. For operators running turbines across remote and high-altitude sites in India, every unplanned maintenance intervention carries a real cost, in time, in safety, and in lost generation.
June 16, 2026. By News Bureau
O&M expenses account for approximately 10-25 percent of the total cost per kWh over a turbine's lifetime, and gearbox maintenance is a major contributor#. Historically, gear oils needed replacing every three to five years - meaning multiple oil change operations across a turbine's lifespan, each requiring turbines to go offline, technicians to go up-tower, and significant logistical effort across often remote terrain. For India's wind operators, every intervention carries a real cost - in time, in safety, and in lost generation.
India's wind fleet is maturing rapidly, and with that comes a shift in priorities. The conversation is no longer just about adding capacity – it is about protecting the investment already in the ground. For operators running turbines across remote and high-altitude sites in India, every unplanned maintenance intervention carries a real cost, in time, in safety, and in lost generation.
Why Are Turbine O&M Costs Rising?
Several factors are driving up the cost of keeping turbines operational. The gearbox is the most complex and most expensive component to service – built to last around 25 years, but vulnerable to temperature fluctuations and load changes that can cause cracking and failure. A gearbox replacement can easily run into six figures once warranty cover expires.
The trend towards larger turbines – hub heights exceeding 90 metres, rotor diameters beyond 120 metres – helps reduce the cost per megawatt-hour, but also raises the stakes when things go wrong. For India's predominantly onshore fleet, operating across diverse terrain and climatic conditions, the combination of scale, remoteness, and ageing assets makes smarter maintenance not just desirable but necessary.
Designing for Longevity: The Fill-for-Life Approach
Mobil SHC Gear 320 WindPower has been engineered to last the full design life of the gearbox – a fill-for-life (FFL) solution. The approach works on three principles:
- Next-generation synthetic base fluid designed to resist oxidation, degradation, and micro-pitting under typical wind turbine operating conditions
- A balanced, fortified additive system that provides excellent protection and can be replenished over time through a complementary top-treat programme, restoring lubricant balance without a full oil change
- Continuous fine filtration during operation, removing contaminants and degraded materials that would otherwise force an early change-out
For India's wind operators – where turbine sites can be hours from the nearest service depot – this means no large-volume oil disposal, no transport of new oil drums, and no service crews climbing towers in extreme heat or monsoon conditions.
Backed by Science: How Mobil™ Earned DNV Certification
ExxonMobil undertook extensive testing to validate Mobil SHC Gear 320 WindPower, including accelerated life testing and field trials underway since 2020. In September 2024, DNV issued a Conformity Statement endorsing its fill-for-life capability – making it one of the first gear oils to earn such a certification, and the first lubricant certified by DNV not to contribute to white etching crack (WEC) formation, a leading cause of premature gearbox failure. Additionally, Mobil SHC Gear 320 WindPower offers the potential to reduce Global Warming Potential (GWP) by up to 80%*** compared to conventional products with shorter oil drain intervals.
Mobil™: A Trusted Partner for India's Wind Sector
Mobil™ lubricants are trusted in one out of every four wind turbines worldwide*. This trust is built on formulation expertise, close OEM collaboration, and a product range that covers every lubrication point within a wind turbine. Through its Advancing Productivity philosophy, Mobil™ focuses on three pillars directly relevant to India's wind operators:
- Safety: Reducing maintenance frequency and extending component life, limiting technician exposure to hazardous up-tower conditions
- Environmental Care: Lubricants that minimise waste and disposal volumes by lasting longer**
- Productivity: Ensuring optimal turbine availability through protection against wear, corrosion, and oxidation
Mobil™ also provides Lubricant Analysis services that help operators monitor lubricant and equipment health remotely – enabling early detection of wear or contamination and shifting maintenance from reactive to predictive.
As India works toward its target of 100 GW of wind capacity by 2030, the reliability of every turbine in the fleet matters. Fill-for-life lubrication is not just a maintenance innovation – it is a strategic investment in the long-term productivity of India's wind energy infrastructure.
Fill with Mobil™. Fill with Confidence.
For more information, visit www.mobil.in/business
*Lubricants for Wind Turbines - Global Market Analysis and Opportunities 2022 by Kline
**Visit mobil.eu to learn how certain Mobil-branded lubricants may provide benefits to help reduce environmental impact. Actual benefits will depend upon the product selected, operating conditions and applications.
***Illustration shows an estimate of the reduction in Global Warming Potential (GWP) for Mobil SHC Gear 320 WindPower through an extended 20 year lifetime Oil Drain Interval (ODI). Wind turbine gear oil GWP tons of CO2-eq estimate is based on a finished lubricant well-to-gate. Based on an average turbine sump size, excluding potential flushing between oil change. Accounts for Mobil Xtra WT top treat program in years 10 and 15. Estimate includes respective Carbon Footprint of Products and oil drain interval.
#Maintenance costs may vary and are based on application-specific operating conditions. Not a guarantee of financial performance. Actual results can vary depending upon the type of equipment used and its maintenance, operating conditions and environment, and any prior lubricant used. Refer to OEM application requirements and oil drain intervals for your equipment.
Exxon Mobil Corporation has numerous affiliates, many with names that include ExxonMobil, Exxon, Esso, and Mobil. For convenience and simplicity, those terms, and references to "corporation," "company," "ExxonMobil," "EM," and other similar terms are used for convenience and may refer to one or more specific affiliates or affiliate groups.
- Vasanth Thangavelu, General Manager - Brand Marketing South AP, ExxonMobil Lubricants Pvt. Ltd.
please contact: contact@energetica-india.net.
Aakshi Mahajan
Head– Digital Marketing
Integrated EPC Solutions are IB Solar’s Strongest Differentiator: Aakshi Mahajan
Satyen Mamtora
MD and CEO
Transformers to Power Energy Future as Grid Modernisation Accelerates, Says Satyen Mamtora
Vedant Goel
Director
Future of Renewable Infra Will Be Built on Resilient Structures, Not Cheapest Ones: Vedant Goel
Udai Singh
MD & CEO
AI, Digitalisation Will Drive Next Phase of India’s Energy Transition: Schneider’s Udai Singh
Stuti Kakkar
Co-Founder & COO
Iron-Air Batteries Can Power India’s Renewable Ambitions: Stuti Kakkar, Meine Electric