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The BMW Range
3 Series
E90, E91, E92, E93
1st oil change for E9x
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<blockquote data-quote="astroboy" data-source="post: 271291" data-attributes="member: 4527"><p>I manage to find this:</p><p></p><p><em>The American Petroleum Institute, API, and Society of Automotive Engineers, SAE, have rated engine oil performance over the years. We have seen the ratings go from SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL with SM to follow. SI and SK were eliminated as they are used by other businesses. There are over 3 dozen tests that oil now must pass in order to make the next higher rating. The tests are defined by the American Society for Testing and Materials, ASTM. Some tests have progressed to a zero tolerance level. For example there can be no sticking of any piston rings any more. I will compare the SL rated oil to the previous SJ oil in a few categories. For simplicity I will skip the units of measurement:</em></p><p><em></em></p><p><em></em></p><p><em>.......S J........S L......</em></p><p><em></em></p><p><em>.......30........20......maximum cam plus lifter wear</em></p><p><em>........9.........7.8.....sludge build up</em></p><p><em>........5.........8.9.....varnish rating (more is better)</em></p><p><em>.......60.......45.......high temperature deposits</em></p><p><em>.......17.......10.......high temperature volatility</em></p><p><em></em></p><p><em>Other categories include: Resistance to rust, resistance to foaming, resistance to oil consumption, homogeneity and miscibility, flow reduction with varying amounts of absorbed moisture, gelation index and others.</em></p><p><em></em></p><p><em>As one can see just going from the previous SJ to the current SL rating is a significant improvement. I cannot wait to get the upcoming SM oil into my cars.</em></p><p><em></em></p><p></p><p>See: American Society for Testing and Materials- <a href="http://www.astm.org" target="_blank">www.astm.org</a></p><p>........Society of Automotive Engineers- <a href="http://www.sae.org" target="_blank">www.sae.org</a></p><p>........American Petroleum Institute- <a href="http://www.api.org" target="_blank">www.api.org</a></p><p></p><p>Anybody has more of the above test standards to pass the different ratings? SM standard should be interesting as its the latest.. I lazy to research.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite7" alt=":p" title="Stick Out Tongue :p" loading="lazy" data-shortname=":p" /></p><p></p><p>The sludge index reduce a lot from SJ to SL... SM should be much better.. and the SH rated Helix as mentioned by Alex is 3 generation old.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /> That's why AB cars all have sludge problems.. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /></p><p></p><p>Oopss.... don't sue me, I am a poor man.. cabutzzz.........</p></blockquote><p></p>
[QUOTE="astroboy, post: 271291, member: 4527"] I manage to find this: [I]The American Petroleum Institute, API, and Society of Automotive Engineers, SAE, have rated engine oil performance over the years. We have seen the ratings go from SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL with SM to follow. SI and SK were eliminated as they are used by other businesses. There are over 3 dozen tests that oil now must pass in order to make the next higher rating. The tests are defined by the American Society for Testing and Materials, ASTM. Some tests have progressed to a zero tolerance level. For example there can be no sticking of any piston rings any more. I will compare the SL rated oil to the previous SJ oil in a few categories. For simplicity I will skip the units of measurement: .......S J........S L...... .......30........20......maximum cam plus lifter wear ........9.........7.8.....sludge build up ........5.........8.9.....varnish rating (more is better) .......60.......45.......high temperature deposits .......17.......10.......high temperature volatility Other categories include: Resistance to rust, resistance to foaming, resistance to oil consumption, homogeneity and miscibility, flow reduction with varying amounts of absorbed moisture, gelation index and others. As one can see just going from the previous SJ to the current SL rating is a significant improvement. I cannot wait to get the upcoming SM oil into my cars. [/I] See: American Society for Testing and Materials- [url]www.astm.org[/url] ........Society of Automotive Engineers- [url]www.sae.org[/url] ........American Petroleum Institute- [url]www.api.org[/url] Anybody has more of the above test standards to pass the different ratings? SM standard should be interesting as its the latest.. I lazy to research.. :p The sludge index reduce a lot from SJ to SL... SM should be much better.. and the SH rated Helix as mentioned by Alex is 3 generation old.. :D That's why AB cars all have sludge problems.. :D Oopss.... don't sue me, I am a poor man.. cabutzzz......... [/QUOTE]
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