The industry has long been concerned about "fuel economy". Especially in recent years, whether from the macroscopic, save precious oil resources, reduce the engine produces greenhouse gas emissions, prevent global warming, etc., to personally, when it comes to buying car ownership, regardless of the poor money, fuel economy is to choose the first post. So it is now well known that "fuel economy" is a way of ensuring that vehicles are powered by a small amount of fuel economy. Then, the formula of the car that is highly relevant to the car engine is in need of improvement.

Oil related international organizations have also been working on new standards in recent years to match the advanced design of car engines. Last year, an American petroleum institute (API) is officially announced that the latest grade diesel engine oil will start on the 1st of December certification of the new oil, the new level or PC - 11 (including CK - 4 and FA - 4). Recently, exxon mobil is first introduced many new upgrade level of CK - 4 and FA - 4 diesel engine oil products, have excellent performance in low temperature and high temperature performance, at the same time of viscosity reducing can effectively improve fuel economy, and to ensure that the engine wear protection, prolong engine life.

And turbine oil in terms of international lubricating oil standardization and certification committee ILSAC GF - 6 standard, since it was first launched in November 2011 after the new concept, is on postponing, from early last year starting delay to earlier this year, however, due to the development of new standards and revision of the test procedures delay, GF - 6 oil start again until September this year. And according to the latest news, is responsible for the development of passenger car engine oil of car oil advisory panel (AOAP) is the release date for the first time and will be put off until December 1, 2017, launch process audit of harsh.

As compared to the past, GF - 6 standard will no longer be a simple, in accordance with the current car performance requirements of form a complete set of turbine oil standard upgrade, the more is more challenge for the future of industry technology, it is expected to next generation engine completely different oil demand, such as more miniaturization and greater load turbocharged, direct injection (gdi) applications, higher requirements on fuel economy. The GF - 6 specification will be broken down into GF - a and two sets of GF - 6 b, the former will completely cover GF - 5 and earlier standards, the latter is a new specifications, mainly for new SAE (the American society of automotive engineers) XW - 16 such low viscosity grade. In addition, the engine timing chain wear and low speed early combustion requirements are specially introduced in the gf-6 specification to cope with the new problems caused by the upgrade of engine technology in the future.

The performance contrast between gf-6a and gf-5 specifications

In the development process, the expert group member agreement requires the introduction of 150 ℃ high temperature high shear viscosity is lower than 2.6 CST oil, therefore in GF - 6, involves the viscosity level will be 30, 20 and 16. Said to reduce viscosity, it is a means to achieve fuel economy the most economical, also widely accept OEM and lubricating oil manufacturers, visible to the new standard development emphasis on fuel economy requirements. Low viscosity can reduce the friction coefficient in fluid lubrication state, reduce the high temperature and high shear viscosity, is helpful to reduce friction between the piston ring cylinder liner, bearing.

According to the test, Honda, the carmaker, said that low viscosity oil could show more fuel economy in engine and platform tests than SAE 0w-20. But it is worth mentioning that if you use the viscosity is too low, such as valves, CAM friction parts may be converted into boundary lubrication condition, it is easy to increase the wear and tear, lead to improved fuel economy is not obvious even worse. So using SAE 16 is a challenge for gf-6 standards, requiring constant technical support and repeated validation.

Gf-5 and gf-6 fuel economy (note: X = 0 or 5)

A review of the previous ILSAC specifications, including gf-1, gf-2, gf-3, gf-4 and gf-5, are required to meet the requirements of ILSAC's energy efficiency standards, as well as to meet the API's corresponding SH, SJ, SL, SM, and SN. But from 1990 to 2000 to GF GF - 1-3, is paid more attention to technical standard itself to ascend, and issued from 2004 GF - 4 standards, significantly enhance the index of fuel economy requirements, further distinguish between friction improver for energy conservation and the role of the bench. The latest development plan, based on gf-6, has seen a significant increase in overall indicators. The fuel economy test of the new program VIE showed that improvements in the efficiency of the xw-20 fuel economy increased by 38.5%, xw-30 increased by 52%, and 10w-30 increased by 66.7%. The experiment further extended the time to 109 h from the age of aging, not only to improve the oil saving rate of the new oil, but also to improve the oil saving properties of the old oil.

All in all, the ILSAC specification has been designed to deal with ever more stringent energy efficiency and emissions requirements. The gf-6 specification will provide the industry with the most advanced and reliable standard and the most efficient and efficient lubrication solution. It can be seen that the oil itself as the key part of automobile products, the future will be from the traditional model of directly improve the existing engine efficiency, gradually into the promoters of the new technology, through continuously improve its own standard formula to guide the engine efficiency, for the global vehicle fuel economy make a great contribution to ascend.