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Registered
Join Date: May 2002
Location: Portland, Oregon
Posts: 12,725
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Our older cars need higher levels of hi pressure anti wear additives than newer cars. The typical additive is ZDDP which contains the Zinc & phosphrous you need. There are numerous suppliers but Brad-Penn 20W-50, Valvoline VR1, Kendall GT and Swepco are popular. lots of info into the how's and why's in the ultimatte oil thrread.
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