ACEA & API spec­i­fi­ca­tions

Car Mechanics (UK) - - Engine Oil & Lubrication -

In­de­pen­dent stan­dards pro­vided by the Amer­i­can Pe­tro­leum In­sti­tute (API) and/or the As­so­ci­a­tion des Con­struc­teurs Européens d’au­to­mo­biles (ACEA) should be noted to de­ter­mine and com­pare oil qual­i­ties.

API petrol spec­i­fi­ca­tions range from SG (1989), SH (1993), SJ (1996), SL (2001), SM (2004) and SN (2010). In many cases, API grades are back­wards-com­pat­i­ble, so an older en­gine that re­quires an Sg-spec­i­fi­ca­tion oil should be able to tol­er­ate an SJ lu­bri­cant of the same vis­cos­ity. Diesel API grad­ings of CH-4 (1998), CI-4 (2002), CJ-4 (2010) and CK-4 (2017) are cur­rent. The ear­lier CA, AB, CD, CE, CF and CG stan­dards are ob­so­lete, al­though you may still see them quoted.

ACEA grades con­sist of ‘A’ for petrol and ‘B’ for diesel and are usu­ally not back­wards-com­pat­i­ble, be­cause they are struc­tured with sep­a­rate classes and cat­e­gories for oils with dif­fer­ent spec­i­fi­ca­tions. The cur­rent stan­dards are: A3/B3 and A3/B4. The lat­est A5/B5 oils are for the lower vis­cos­ity types. C grade oils are in­tended for low SAPS blends, to pro­tect par­tic­u­late fil­ters, and con­sist of C1, C2, C3 and C4 grades. ACEA C5 is suited for the lat­est gen­er­a­tion of fuel-econ­omy 0W-20 and 5W-20 oils.

Man­u­fac­turer spec­i­fi­ca­tions are nu­mer­ous. Should one be pro­vided in your car’s lit­er­a­ture, use an oil that com­plies with the rel­e­vant code.

Newspapers in English

Newspapers from UK

© PressReader. All rights reserved.