ETRO 4+ is a high quality Group III+ base oil, manufactured from a unique feedstock by using a proprietary hydro-treatment - and wax isomerization process and hydrofinished to a colourless liquid. The base oil is highly isoparaffinic and exhibits a very high viscosity index as well as superior low-temperature performance. It has an excellent viscosity-volatility relationship. Applications: ETRO 4+ is the preferred choice for formulating cost effective, high-performance, low-viscosity engine oils due to its superb viscometrics and low volatility. This base oil is also suitable for application in industrial equipment, such as compressors, hydraulic systems, gears and turbines. Features and Benefits: Very high viscosity index Excellent volatility for low-viscosity engine oils Superior low-temperature performance Good oxidation stability Formulation Support: ETRO 4+ is supported with top-tier engine oil formulations that meet the requirements for: API SN ILSAC GF-5 ACEA 2012* OEM Specifications