C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Apr 21, 2008 | 10:03 PM
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kubesh
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From: Olivia mn
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hey guys, now don't bash me, I need an honest answer

I just put synthetic oil in my grandpa's 65 mustang and he has talked to some mechanics, they said the synthetic oil will make the seals leak.

is this true? thanks, you guys always give great info
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Old Apr 21, 2008 | 10:22 PM
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From: Bridgewater nj
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You will get a debate on this one In my experience, my engines I had no problem but my Dana 60 axle seals leaked when I switched I think it depends on what condition your seals are in when you switch. If their very old or worn you may have problems.
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