18-04-2020, 06:46 PM
(This post was last modified: 19-04-2020, 12:59 PM by Tony Griffiths.)
Note the API rating of GL4, this means that the sulphur added to improve performance is inactive and will not attack bronze bearings. Oil with an API rating of GL5 also had inactive sulphur.
In an EP oil does not have GL4 or GL5 rating it will attach bronze bearings over time.
In an EP oil does not have GL4 or GL5 rating it will attach bronze bearings over time.