also is this true?;; Diesel engine  requirements are much different that 
those of gasoline engines. The higher  speeds and lower bearing 
surface-to-power 
ratios of gasoline engines require oil  with higher shear ratings than most 
diesel oils. Diesels also have higher  bearing clearances and that calls for 
higher viscosity oils. The additional  detergents required for soot control 
actually reduce the effectiveness of added  levels of ZDDP found in diesel 
oils. 
Also, newer diesel oils beginning in 2007  have greatly reduced their content 
of 
ZDDP
 
 
 
 
 
In a message dated 7/12/2008 8:37:19 A.M. Central Standard Time,  
[EMAIL PROTECTED] writes:


Harlan, I just got through reading the thread that Bill sent. I work  for 
Chevron Oronite Company, we are a Petrochemical part of Chevron. That is  the 
part of Chevron that manufactures the additives that go into lubricating  oils. 
Many other companies use our additives in their engine oils. I use the  DELO, 
D-iesel E-ngine L-ubricating O-il, because it still contains the  sufficient 
amount of Zinc and Phosphorous to protect our flat tappet  engines. Along with 
the Zinc and Phosphorous there is also a small amount of  Moly in this oil. 
Reading the thread just reaffirmed my belief in the  products that we make and 
sell at  COC.

John  L



 



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