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Registered
Join Date: Jan 2007
Location: Mosier, Oregon USA
Posts: 48
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You might want to check your 928 owners manual for Porsche's oil viscosity spec. The Lycoming oil viscosity spec probably plays a big part in choosing oil for your Aztec.
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Louis Ott
'90GT, 6.5L 585hp/535tq (NA)
'91 GT (in rehab)
'79 5 spd (mostly dead)
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