High mileage oil?
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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.
![Smile](https://www.gmforum.com/gm/images/smilies/smile.gif)
At 124,000 and getting near 143,000 this is what I see..
![](https://img.photobucket.com/albums/v294/Jr3800/95%20Misc/Picture138.jpg)
![](https://img.photobucket.com/albums/v294/Jr3800/Engine%203800C/HPIM1245.jpg)
Neither one of them leak...
![Wink](https://www.gmforum.com/gm/images/smilies/wink.gif)
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
![Wink](https://www.gmforum.com/gm/images/smilies/wink.gif)
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