Excessive oil consumption

Tiny
TYLERTH126
  • MEMBER
  • 2004 AUDI A4
  • 3.0L
  • V6
  • 4WD
  • MANUAL
  • 115,000 MILES
I've been going through a lot of oil, but it's not been dripping on the ground or anywhere. Now there's been some blue smoke coming from the exhaust when I start the car and it's been sitting awhile.
Tuesday, January 7th, 2020 AT 8:25 PM

5 Replies

Tiny
94 TRANSAM
  • MECHANIC
  • 680 POSTS
If the car sat for a long time the first thing I would look at are the valve seals. They likely dried out and cracked and are now leaking.

Rich
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Wednesday, January 8th, 2020 AT 12:41 PM
Tiny
TYLERTH126
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  • 3 POSTS
No it hasn't been sitting.
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Wednesday, January 8th, 2020 AT 2:46 PM
Tiny
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Your last statement was "and it's been sitting awhile".

How long is a while?

Rich
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Wednesday, January 8th, 2020 AT 3:15 PM
Tiny
TYLERTH126
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  • 3 POSTS
It has not been sitting at all.
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Wednesday, January 8th, 2020 AT 4:27 PM
Tiny
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  • MECHANIC
  • 680 POSTS
Here is a list of things that can cause oil consumption resulting in tailpipe smoke:

- Bad valve seals (will run normal)
- Warn out valve guides (normal to possible low power)
- Worn out piston rings (may run normal, may start hard and have low power)
- Plugged PCV valve (Poor performance all around)
- Blown head gasket/ warped head (may run normal, may start hard and have low power)
- Cracked engine block or head (may run normal, may start hard and have low power)
- Cracked piston (may run normal, may start hard and have low power)

If you need help with any of these please let me know.

Rich
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Wednesday, January 8th, 2020 AT 5:44 PM

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