Skip the auto shop - Our mechanics make house calls

Q: burning oil

asked by on

Suzuki Vitara 2.0 v6 1997. About five years my car burns and consumes lots of oil and idling rough(1.6RPM on working temperature). The smoke is white to blue, no coolant consumption or leaks around. Many mechanics would say to change the engine. Accidently when checking the oil level I forgot to put back the deep stick. After few miles it stopped burning oil allmost at all but still rough idling. Any idea what would be the reason for this, can we exclude expensive repair? Thanks a lot

My car has 100000 miles.
My car has a manual transmission.

A: If the Positive Crankcase Ventilation (PCV)...

If the Positive Crankcase Ventilation (PCV) system is blocked, crankcase pressure will rise, which tends to draw oil into the combustion chambers (on the intake stroke) where the oil is then of course burned. In the case of such a PCV blockage, leaving off the dipstick would create an escape route, to the atmosphere, for the excess crankcase pressure, thus tending to reduce the oil consumption. The rough running could be due to fouled plugs and possibly a blocked catalytic converter as burning oil will wreak havoc on those components. However, there are many potential causes of rough engine idle ranging all the way from the mechanical condition of the engine, such as uneven cylinder pressures, to faulty fuel supply, ignition or air induction components. If you desire, during a mobile diagnostic a certified Mechanic from YourMechanic can check out the PCV system and diagnose the rough running engine.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Floor mat entrapped accelerator, increasing speed, and destroyed engine

Hello. I have seen this occur several times on this particular model. Due to the design of the floor mat it comes loose and gets under the gas pedal which causes this to occur. This happens even more often with...

Q: Overheating Under Load

Hello. To start, you may have a restriction in the system somewhere. This will come in the form a clog in the radiator, or the water pump going out. Both of these units can be tested individually. The clogs will...

Q: how do i fix my ignition switch that someone broke its the bar that turn the car on is not connected so i have to push the bar

You most likely will have to replace the ignition lock cylinder, which is the entire housing where the key is inserted and the ignition assembly is turned. You can have one of our mobile mechanics complete this job for you;...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...