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1979 GMC Sierra hwy oil usage

Tiny
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  • 1979 GMC SIERRA
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?
Friday, June 6th, 2014 AT 6:45 AM

5 Replies

Tiny
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  • MECHANIC
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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?
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Friday, June 6th, 2014 AT 7:16 AM
Tiny
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Yes, but can't tell where it's leaking from, sprayed all over lower part of engine. I'll try tightening oil pan bolts.
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Friday, June 6th, 2014 AT 12:35 PM
Tiny
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You have to completely clean the engine and then run it to see the source of the leak.
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Friday, June 6th, 2014 AT 1:03 PM
Tiny
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Thnx. I'll try it after tightening bolts. My main? Was why does it leak only on the hwy. More pressure at high speeds?
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Friday, June 6th, 2014 AT 1:11 PM
Tiny
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It probably leaks around town too, just not as much.
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Friday, June 6th, 2014 AT 2:24 PM

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