1968 Dodge Charger loses hp when i replaced the oil

1968 DODGE CHARGER
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MICHAEL WALKER
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Engine Performance problem
1968 Dodge Charger V8 Two Wheel Drive 667584 miles

my 68 charger lost hp when i switched brands i went from pennzoil to castrol
Sep 11, 2009 at 4:12 PM
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HMAC300
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I dontl know how you can think your hp went down unless you have a dyno to check it all the time and dynos are notoriuous for different readings due to temp/humidity,etc. If you want a better thing switch to synthetic oil.
Nov 15, 2009 at 3:10 PM