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Old 12-08-2012, 10:38 AM   #1
rogerstrampoline
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car burning oil

Pretty sure my astina is burning oil....checked for leaks but there's no drips etc so I've guessed aburning oil. In about 500km the oil goes from full to about 1/4 above low...what do u guys reckon the problem could be? I'm using a 10-w40 shell oil..do u think I should try a thicker oil? Mind u I have the bpt setup on my n/a block and has 205,000km on it.
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Old 12-08-2012, 11:42 AM   #2
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Was it burning oil before the turbo was fitted?
If it wasn't then it maybe the bearings in the turbo.
My old B6T used to drink at least 500 ml of oil per tank of fuel.
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Old 12-08-2012, 11:59 AM   #3
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Nah only after the turbo....and didnt happen straight away cuz it was fine for like a month then just started like 2-3 weeks ago
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Old 12-08-2012, 01:58 PM   #4
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Is it a new turbo? Only ask Cus it could be the seals internally either in to the compressor (easily seen if you take piping off straight after turbo, but unlikely) or in to the turbine (more likely, but a little harder to spot due to oil being burnt in the dump pipe)
Either way sorry to hear it
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Old 12-08-2012, 02:25 PM   #5
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oil too thin for a bp that old. 15W50 or 60 full syn. but thin oil might be highlighting another issue. ie worn oil rings or turbo bearings.
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Old 12-08-2012, 03:17 PM   #6
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Are you getting any smoking out that back? Soot on the rear bumper?

Most likely its the turbo eating oil if you didn't have the issue before. Did it have any shaft play and how many km on it?
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Old 12-08-2012, 03:18 PM   #7
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Nah old turbo as it came off a mates astina when he first did the turbo conversion a few years back but no shaft play etc and yeah i thought the oil May be too thin but wasnt sure as I thought the turbo would need thin oil
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Old 12-08-2012, 03:27 PM   #8
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And no there isn't smoke or soot out of exhaust so that's a plus
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Old 12-08-2012, 03:31 PM   #9
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If you weren't burning oil pre-turbo I'd be looking at the changes you made before going up a weight.

If there's no smoke or soot it sounds like a leak somewhere. You could have a pressure leak on the oil feeds to the turbo? Smell anything burning when its hot? Run you hands everywhere that oil could leak from when its cold, even if its not obviously dripping. If its wet you've found your culprit
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Old 12-08-2012, 09:37 PM   #10
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Another thing I just realized, if you have worn rings as Ryan said, you might have excessive blowby, pressurizing the crank case and then you either loosing oil through the breather in to the intake (or catch can?) or it's going out the front/rear seal. The rear seal leak isn't very visible (you have to look at the bell housing join) and the front one is a little tricky as well due to the gear directly I front of it.
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Old 13-08-2012, 03:38 AM   #11
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check the simplest things first.... make sure the air filter is not dirty/obstructed, and the PCV valve works (do the rattle test)
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Old 17-08-2012, 11:10 AM   #12
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Mounted my AFM correctly with a silicone 90 to the pod and redid my iac line and now thr oil problem is solved not even 1mm drop in 300km
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Old 17-08-2012, 12:26 PM   #13
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Wow, strange. Must have been screwing with the pcv valve or something. Good to know its no longer hungry for oil.
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Old 17-08-2012, 12:28 PM   #14
rogerstrampoline
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Yeah wierd i know :S I also changed the pcv valve when I did the turbo so its brand new
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