Originally Posted by Boreas
Originally Posted by 95seand78z28
I've been warned by friends not to switch to synthetic in you're over 50 to 75k.
Baloney, i've used synthetic last year when it was 185,000 miles.
I have used 3 kinds of oil, Havoline, Mobil and Mobil 1... I cjange every 3000, or at least try to...
At 124,000 and getting near 143,000 this is what I see..
Neither one of them leak...
Let me add this, tyhe high milage oils have a bit more of an additive package to help older seals, it keeps them from leaking, or at least tries to... I can see where this would be good on a chevy 350, we all know what they do to valve stem seals...
3800'* don't have big problems in that area, but then again it couldn't hurt to use high milage oil
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