01 GT Intelligent Synthetic Formula - 10W40

ILSAC GF-6 is the International Lubricant Standardization and Approval Committee's latest fuel economy certification. While API SP focuses on engine protection, ILSAC GF-6 adds a measurable fuel economy requirement — oils carrying this certification must demonstrate a minimum 0.5% fuel economy improvement over baseline in standardised tests. For Indian car owners paying high petrol prices, this translates to real savings over 50,000+ km. API SP + ILSAC GF-6 together is the highest dual certification available for petrol engine oils.

10W40 is the correct grade for **older petrol cars (approximately 2005–2015)** before Indian OEMs transitioned to ultra-low-viscosity grades. Confirmed applications: - **Honda City 3rd gen (2008–2013)** and Civic (2006–2012): 1.5L iVTEC specified 10W30 or 10W40 - **Hyundai Verna (2006–2014)** and older Elantra: 10W40 or 15W40 - **Toyota Innova first gen (2004–2012) petrol**: 10W30 or 10W40 - **Renault Duster 1.6L H4M petrol**: 10W40 or 5W40 - **High-mileage modern cars** above 120,000 km where a slightly thicker grade compensates for engine wear **Important:** Most modern BS6 Indian cars (2020+) from Maruti, Hyundai, Tata, Kia, and Honda now specify 0W16, 0W20, or 5W30 — these are too thin-spec for 10W40 to be appropriate. For example: Maruti Vitara Brezza (0W16), Tata Nexon petrol (5W30), Hyundai Creta (0W20/0W30), and Kia Sonet (5W30) all require thinner grades. Always check your owner's manual first.

For older or naturally aspirated petrol engines without turbochargers in hot Indian climates, 10W40's slightly thicker operating viscosity (40 vs 30 grade) can provide marginally better oil film strength at high temperatures. However, if your car manufacturer specifies 5W30, do not switch to 10W40 — modern turbo engines are calibrated for thin oil to ensure proper turbo bearing lubrication. Always follow the manufacturer's specification and use temperature as a tiebreaker only when both grades are listed.

For long-distance highway driving (highway mileage of 15,000–20,000 km/year), the 01 GT's synthetic-blend base outperforms mineral oil in two key areas: thermal stability (maintains viscosity across the long temperature swings of a highway journey) and shear stability (resists viscosity loss when oil is forced through tight bearing clearances repeatedly). This means the oil at 5,000 km of highway use is still closer to its original viscosity spec than a mineral oil would be.