What is the disadvantage (or benefit) from the decreased Ca and increased Mg..

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in the gold GC formulation? This is for emissions, I take it. Does this equal less protection? It seems that emissions and optimal engine protection do not go hand in hand.
 
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MolaKule wrote:
quote:
Both the Ca and Mg act as detergents and to a lesser degree, friction modifiers. It is a non-issue in my opinion.
Really? Then why did you write in this thread about the Castrol Syntec 5W40: http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=11;t=000183;p=1#000009
quote:
This oil's additive package looks like something they dreged from the Black Lagoon of an SD rated HDEO. They need to drop the Mag. by 1000 ppm and increase the Calcium by 1800 ppm.
Which sounded a lot like making the Castrol Syntec 5W40 more akin to the Castrol Syntec 0W30 Green formulation with its high calcium and lower magnesium levels? Regards, Rich
 

HardCharger

Thread starter
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quote:
Originally posted by RichD: MolaKule wrote:
quote:
Both the Ca and Mg act as detergents and to a lesser degree, friction modifiers. It is a non-issue in my opinion.
Really? Then why did you write in this thread about the Castrol Syntec 5W40: http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=11;t=000183;p=1#000009
quote:
This oil's additive package looks like something they dreged from the Black Lagoon of an SD rated HDEO. They need to drop the Mag. by 1000 ppm and increase the Calcium by 1800 ppm.
Which sounded a lot like making the Castrol Syntec 5W40 more akin to the Castrol Syntec 0W30 Green formulation with its high calcium and lower magnesium levels? Regards, Rich

Ha! What's up with that, Molakule?
 
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quote:
Ha! What's up with that, Molakule?
What MK was saying, IMO, is that you can achieve similar results using both Mg and Ca, but the new overbased Ca is a more expensive approach. It's the balance of the two that you have to reach. In his approach, he would use the more expensive Ca. Mg is rarely used anymore and it's more of a cost issue among most blenders.
 
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Dixie
Most CI-4+ or ACEA "B4" rated diesel oils will have the high Ca and low Mg, to minimize high temp carbon/varnish deposits on the crowns, the lands and in the ring grooves. This really isn't an issue with water cooled, gas engines, but it is with air cooled motorcycles and other smaller, air cooled four strokes, since they run so hot.... TS
 
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Baltimore
quote:
TooSlick: Most CI-4+ or ACEA "B4" rated diesel oils will have the high Ca and low Mg, to minimize high temp carbon/varnish deposits on the crowns, the lands and in the ring grooves. ....
If you take a look at VOAs of Mobil 1, you'll note that the bulk have relatively high calcium and low magnesium - except for the SUV (Delvac 1) which has a greater ratio of magnesium. The additive which shows up as magnesium has some advantages in prolonged drain intervals in diesels for which Delvac 1 was developed. The downside of it is that it contributes to spark plug fouling in spark ignition engines. .
 
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We will just have to hope that with the change in formula has come an equivalent improvement in the suppression of the negative effects of the Mg (if that is possible through chemistry). We all have to keep in mind that as technology changes, there may be an accompanying change to the way we have normally seen things work.
 
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