Engine oils come in many formulations
WE ALL read about food labelling and oil labelling is no different. For the typical layman to read an oil label they need to know what the different Society of Automotive Engineers or the grade of oil you require and understand the Engine Oil Standard your vehicle best operates on, either diesel or petrol.
The main Engine Oil Standards are rated by the US, European or Japanese manufacturers.
There are several others but these are the main ones.
Always check the owners / manufacturers handbook for correct oil.
The society grade of oil is defined by SAEJ300 numerical code system from low to high viscosity.
For a single-grade engine oil, there are 11 grades from 0W, 5W, 10W, 15W, 20W, 25W, 20, 30, 40, 50 and 60.
The ‘‘W’’ by stands for winter – not weight. These numbers are often referred to as the ‘‘weight’’ of motor oil. The lower the viscosity grade, the lower the temperature the oil can pass through a certain size hole. For example, if an oil passes at the specifications for 10W and 5W but fails for 0W, then that oil must be labelled as an SAE 5W.
For a multi-grade oil, the designation includes two viscosity grades.
For example a 10W-30 must pass the SAEJ300 viscosity grade requirements of a 10W and 30.
Check the owners / manufacturers handbook for correct oil.
The US standard of API Engine Service Classifications starts with a ‘‘C’’ code for diesel vehicles and for petrol vehicles the code starts with an ‘‘S’’.
The second letter assists with the age of the formula. So when you read a ‘‘CD’’ code, this is an old formula rating for the older vehicles in our fleet.
A ‘‘CF-2’’ was designed in 1994 for a two-stroke engine.
The ‘‘CI-4’’ classifications are a current formula used in some of the more modern fourstroke engines.
In fact we are now seeing vehicles that take a ‘‘CJ-4’’ formulated lubricant. With the petrol ratings, an ‘‘SF’’ class was introduced for 1980 passenger petrol cars, ‘‘SG’’ suitable for 1989 passenger cars, vans and light trucks. ‘‘SH’’ – 1994 current and earlier. ‘‘SJ’’ – 1996 to1997 vehicles. ‘‘SL’’ would suit 2001 vehicles or ‘‘SM’’ is for 2004 modern vehicles.
As you can see the higher up the alphabet the newer the formula of oil.
In most cases a new oil formulation will meet the requirements of earlier classes of oil, however this is not always the case and you should check what oil your vehicle requires.
Under the European standard, (ACEA) we can find the Class that read ‘‘A or B’’ suitable for Petrol and Diesel engines, and ‘‘E’’ for Heavy Duty Diesel Engine Oils followed by a number to define the Category.
The Year number is intended only for industry use and indicates the year of implementation.
Japanese Automotive Standards Organisation or JASO ratings are defined by DH-1or DX-1, etc
One other subject on the label is the base oil – if it’s a Mineral, Synthetic or SemiSynthetic based oil.
Anglomoil Reps are always ready to assist our customers in choosing the correct oil be it for a passenger vehicle, a harvester, a racing boat or a tractor. The website (www.anglomoil.co.nz) has details on products along with the specifications of each oil.
‘‘Always, always check the owners/manufacturers hand book for the correct specifications for your engine.’’
Speak to your supplier or talk to reps before deciding on the oil to use.