![]() The two current JASO classifications are low ash formulations for where engines are equipped with after-treatment devices such as DPFs and catalysts. Some of the tests used in these JASO classifications are specific to Japanese diesel engines. The Japanese Automotive Standards Organisation (JASO) has also developed specifications for Diesel Engine Oils which primarily focus on piston cleanliness, valve train wear, soot carrying ability and high temperature oxidation resistance. ![]() ACEA classifications tend to require higher stay-in-grade viscosity performance, tougher exhaust treatment system compatibility, and some ACEA classifications are focussed on providing longer oil drain service. There are ACEA engine oil specifications for car and light van petrol and diesel engine oils (classification A/B), engine oil specifications for high performance car and light van petrol and diesel engine oils requiring catalyst compatibility (classification C) and engine oil specifications for heavy duty diesel engine oils (classification E). In Europe, however, the European Automobile Manufacturers’ Association (ACEA - Association des Constructeurs Europeens dÁutomobiles) engine oil specifications were introduced in the early 1990s. API FA-4 oils cannot be used in place of API CK-4, CJ-4, CI-4 and CH-4 oilsĪPI Service Classifications are specifically defined to cover the lubrication needs of North American diesel engines, though manufacturers around the world commonly use the API Service Classifications to specify Diesel Engine Oils for their engines. For the first time, a new API Service classification is neither interchangeable nor backward compatible with previous classifications. API FA-4 oils are formulated to address greenhouse gas emissions and to meet the needs of highly developed exhaust treatment systems which have not yet been introduced. However, at the same time that the API introduced API CK-4, they also introduced Service Classification API FA-4 which specifies SAE XW-30 DEOs specifically designed for diesel engines likely to be developed from 2017 onward. API CK-4, CJ-4, CI-4 and CH-4 oils may be used where lower classification oil (such as API CG-4) is recommended. The API C series of service classification are backward compatible. Later API Diesel Engine Oil Service Classifications, such as API CH-4, CI-4, CJ-4 and the recently introduced CK-4, were developed with a focus on the requirements of Exhaust Gas Recirculation (EGR), PDF and catalyst systems in engines introduced from the early 2000s. From 1985 onward, API Service classifications API CE, CF-4, CF CF-2 and CG-4 were introduced to meet increasing demands for control of high temperature piston deposits, valve train wear, oxidation resistance and soot accumulation. The engine oil for Detroit 2-cycle diesel engines was determined by its ‘sulfated ash’ level, and an engine oil meeting API CC was usually used.īut, as diesel engines developed, there became a need for higher performance Diesel Engine Oils to provide better control of oil consumption, piston ring belt cleanliness, oil system sludging and piston top land deposits. You generally put API CC oils into non-turbocharged diesel engines and API CD oils into turbocharged diesel engines. ![]() In the ‘good old days’ from the mid-fifties until the mid-eighties, Diesel Engine Oil performance was specified by either American Petroleum Institute (API) Service Classification API CC or API CD. However, they probably shouldn’t be used for continuous operation in ambient temperatures above 30o C.īut it’s when we describe a Diesel Engine Oil’s performance that matters becomes complicated, and the use of the wrong type of DEO can damage some modern diesel engine components such as the diesel particulate filters (DPF) and exhaust treatment systems. These are recommended for starting at lower temperatures and provide a slight fuel economy gain. As well, SAE 10W-30 multigrade DEOs are available. This allows starting down to -20o C and continuous operation up to ambient temperatures of 40o C. For most diesel engines operating in New Zealand, an SAE 15W-40 multigrade Diesel Engine Oil will be suitable. ![]() From the chart above we can see that lower SAE “W” grades are specified for start-up at lower temperatures, and higher “non-W” grades are recommended for operation at higher ambient temperatures. ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |