En­gine oils come in many for­mu­la­tions

Matamata Chronicle - - Rural Delivery -

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.

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