TT17-1103

Tech Tips
Date: July 22, 2011
TT 17-11-03
2009-2010 Routan – Oil Consumption Testing
June 28, 2013: Update to Information.
NORMAL OIL CONSUMPTION: Below are industry standards for normal engine oil consumption:
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Mileage below 50,000: Normal oil consumption is one quart for each 1,000 miles driven.
Mileage above 50,000: Normal oil consumption is one quart for each 750 miles driven.
TEST TO DETERMINE ENGINE OIL CONSUMPTION:
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Operate engine to normal operating temperature.
Fill engine oil precisely to FULL mark on dip stick gauge.
Use paint pen to mark the engine oil drain plug to prevent tampering.
Check engine oil level after 1.000 miles driven. Refer to normal engine oil consumption listed
above.
POSSIBLE CAUSES FOR EXCESSIVE ENGINE OIL CONSUMPTION:
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PCV OR CCV SYSTEM: Check the crankcase ventilation system for proper operation. Oil may
accumulate in the throttle body or intake manifold. Rocker arm lubrication oil flow returns to oil pan
through drain back holes in top of cylinder head. Plugged or restricted oil drain back holes may
contribute to excessive oil in crankcase ventilation system.
SPARK PLUGS: Examine all spark plugs to identify the affected cylinder(s). Spark plug on the
affected cylinder(s) will usually be fouled or wet with engine oil.
VALVE GUIDES AND VALVE STEM SEALS: Inspect valve guides on the affected cylinder(s).
Replace valve stem seals on the affected cylinder(s).
PISTON RINGS: Check piston rings on the affected cylinder(s). Piston rings may be too tight, worn,
or broken or there may be carbon build up in the oil control ring.
CYLINDER WALL: Examine the cylinder wall on the affected cylinder(s). Cylinder wall may be
severely scuffed.
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© 2013 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual
property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this
document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these
materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.
Tech Tips
Be aware that a procedure for oil consumption testing is available in the Repair Manual under Non-DTC
Based Diagnostics as shown below.
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© 2013 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual
property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this
document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these
materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.