In city driving my PU truck uses no oil, but in hwy. driving it uses lots. Don't think it's burning it. Could I have bad gasket somewhere?
Jun 5, 2014 at 11:45 PM
1979 GMC Sierra hwy oil usage
ROBERTHARE
- MEMBER
- 3 POSTS
If you don't think it is burning it, then where do you think it is going. It either leaks or it gets burned so, do you see any leaks?
Jun 6, 2014 at 12:16 AM
Yes, but can't tell where it's leaking from, sprayed all over lower part of engine. I'll try tightening oil pan bolts.
Jun 6, 2014 at 5:35 AM
You have to completely clean the engine and then run it to see the source of the leak.
Jun 6, 2014 at 6:03 AM
Thnx. I'll try it after tightening bolts. My main ? was why does it leak only on the hwy.. More pressure at high speeds?
Jun 6, 2014 at 6:11 AM
It probably leaks around town too, just not as much.
Jun 6, 2014 at 7:24 AM
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