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Oil use and leak

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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Joined: Mon Jul 15, 2019 6:39 pm
Year and Model: 2011 c70t5
Location: California

Oil use and leak

Post by Karenz4 »

I have a 2011c70t5 that uses oil and has an engine oil leak. Seems to use too much fuel too. Also some smoke at exhaust when it sits at an idle for five minutes or so.
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Re: Oil use and leak

Post by Clemens »

The T5s are not designed to sit idle for a long time Volvo claims. If it has an oil leak, go figure out where it is. You might need to redo the PCV system (do the glove test). If your crank pressure is too high oil might be pushed out of various seals and gaskets. If you still lose oil AFTER doing the PCV and passing the glove test, ATP 205 might help cure worn seals.

Btw., you are in the sub section for cars up to 2000.
Summer: 1996 855 R
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Re: Oil use and leak

Post by greg850r »

Is the smoke black? The oil leak might not be related to it.
I don't know if they still have a vacuum operated fuel return regulator under the fuel rail in 2011 like my late 90s cars do, but someone who does will see this and tell us. If there's fuel in the vacuum line to that it is bad and you'll get black smoke at an idle and poor mileage.
05 Cross Country wagon
99 C70 Convertible
96 850R wagon
96 850T wagon
96 850 GLT 5spd N/A sedan
97 850R 5spd sedan
66 GTO 421SD 4spd
67 GTO 455 T400
02 Powerstroke 4x4
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24' 454 Challenger
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