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Registered
Join Date: Oct 2007
Location: Wright Patterson AFB, Dayton, Oh
Posts: 417
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any 20w50 with high levels of ZDDP (actually getting hard to find). Generally you want dino oil, synthetics can cause an older engine to leak.
search for "ultimate motor oil thread"
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Don't Lift... Don't Lift... Don't Lift 
'75 Targa in "Arrest Me" Red, 3.0SC ('79) engine, Bilsteins, Turbo Tie-rods, SSIs into 2-1 M&K muffler... and looking for my next upgrade.
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