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<blockquote data-quote="viewfinder" data-source="post: 380126" data-attributes="member: 1704">LL04 covers wider area in the chart than LL01 (similarly MB229.51 over MB229.5).&nbsp; LL04 has higher rating in &#039;fuel economy&#039; and &#039;soot thickness&#039; in the chart while others are equal to LL01.&nbsp; So &#039;soot thickness&#039; is meant to address &#039;low ash&#039; requirement for diesel engine.&nbsp; Then &#039;fuel economy&#039; seems to be more than just satisfying &#039;low ash&#039; requirement for diesel engine.&nbsp; Given a choice @ the same price (or lower in the case of Castrol pro SLX 0w30), it makes sense to choose one with latest certification.&nbsp; The bottom line is maybe whether the data in the chart is credible or not, and over-generalize things or not.Astroboy, if I simply quote a Nissan car plate number (from my relative&#039;s Nissan), I wonder if&nbsp; Nissan SC would sell me the oil?&nbsp; Or actually have to pull up at the service center with a Nissan.</blockquote>

[QUOTE="viewfinder, post: 380126, member: 1704"] LL04 covers wider area in the chart than LL01 (similarly MB229.51 over MB229.5). LL04 has higher rating in 'fuel economy' and 'soot thickness' in the chart while others are equal to LL01. So 'soot thickness' is meant to address 'low ash' requirement for diesel engine. Then 'fuel economy' seems to be more than just satisfying 'low ash' requirement for diesel engine. Given a choice @ the same price (or lower in the case of Castrol pro SLX 0w30), it makes sense to choose one with latest certification. The bottom line is maybe whether the data in the chart is credible or not, and over-generalize things or not. Astroboy, if I simply quote a Nissan car plate number (from my relative's Nissan), I wonder if Nissan SC would sell me the oil? Or actually have to pull up at the service center with a Nissan. [/QUOTE]

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