[GreenKeys] OT: ZDDP (OT)

[COURYHOUSE at aol.com]

so in theory.... this  would  be  better  for   ttys  too.
 
Interesting info  Don!
ED#
 
  In a message dated 8/10/2012 6:21:31 P.M. US Mountain Standard Time,  
k9tty at dls.net writes:

A couple  of you asked.  Hopefully the rest of you will not mind...

Don  K9TTY



THIS IS AN INFORMATION BULLETIN FROM THE VALVOLINE  DIVISION OF THE  
ASHLAND OIL CO.

The level of "zinc" in  today's engine oil is a hot topic among hands- 
on car enthusiasts. Whether  in online chat rooms, blogs or message  
boards, or in the retail  store, customers are seeking answers to make  
sure they are  protecting their investment.

What is zinc?

The anti-wear  additive commonly referred to as "zinc" by most  
automobile  enthusiasts, is actually short for Zinc/ 
DialkylDithioPhosphates or ZDDP.  As an anti-wear additive, its primary  
role is to prevent  metal-to-metal contact between engine parts by  
forming a protective  film. Despite being referred to as "zinc," this  
additive actually  contains zinc and phosphorus, with phosphorus  
performing the  anti-wear function.

How zinc/phosphorus works

The  zinc/phosphorus molecules react in the oil and release phosphorus-  
containing compounds that make a wear-resisting phosphate glass film   
on the critical surfaces of contacting engine parts. With most  brands,  
this process also results in phosphorus being released with  engine  
emissions into the catalytic converter, where it can poison  the  
emissions system over time.

Why zinc/phosphorus level in  engine oil has changed

With ever increasing limits on emissions,  automobile manufacturers  
have tightened emission control systems on  newer vehicles. This is one  
of several factors considered when the  American Petroleum Institute  
(API) sets standards for engine oil.  The current API standard is "SM,"  
which replaced the previous "SL"  classification. Because phosphorus  
can poison a vehicle's emission  system, the level of zinc is lower for  
current engine  oil.

Many hands-on car enthusiasts and engine experts believe the  lower  
levels of zinc in "SM" rated engine oil is causing excessive  wear in  
older style push-rod and flat tappet engines. This is  despite the fact  
that all new engine oil classifications are  intended to be backward  
compatible. This has resulted in the widely  accepted belief that  
modern engine oil is not adequate to protect  older engines.

Consumer Solutions

There are high-zinc engine  oils available to meet this need. It is  
important to note, however,  that the entire additive package still  
needs to be balanced for best  performance. For example, engine oil  
with a high zinc level but low  detergent may not perform over a drain  
interval of 3,000 miles or  longer.

Valvoline offers two solutions to the zinc  issue

Valvoline Racing VR1: 75% higher zinc than SM engine oil with  a  
balanced additive package designed to work in both racing and  street- 
legal applications. This product will protect older style push-rod  and  
flat tappet engines. Valvoline provides this product in both  multi and  
mono viscosity grades: SAE 20W-50 (part vv211), straight  SAE 50 (part  
vv235), SAE 10W-30 (part vv205), SAE 30(part vv223),  SAE 40 (part  
vv229), and SAE 60 (part vv241)

Longer-Lasting  Zinc/Phosphorus: Valvoline uses an advanced zinc/ 
phosphorus additive that  keeps higher levels of phosphorus in the  
engine oil where it  protects the engine, instead of poisoning the  
catalytic converter.  Valvoline is the only brand offering this unique  
additive across its  entire line of passenger car engine oils,  
including SynPower, which  is the only synthetic offering this  
additive.  www.valvoline.com

Additional resource information is available by  calling the Valvoline  
Technical hotline at  1-800-832-6825.
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