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Oil Consumption - Normal or not

Jansen

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Jansen Enthusiast

Jansen

Posted
Posted

Ok, 90 percent of my driving is 7 miles round trip to work, then 3 miles round trip to the gym. I'm burning a quart of oil every oil change (normally 4,000 - 5,000 miles). What I've noticed:

 

- have piston slap (acknowledged by dealer in writing, but no action will

ever be taken)

- with mobil 1 5w30 if you pass on the highway, you smell it

- with mobil 1 15w50 if you pass on the highway, you don't smell it

- Oil analysis at 24,000 miles said engine was fine (no abnormal wearing etc)

- Recently took a 750mile round drip with about 3,500 miles on the oil and didn't

burn a drop (70mph-75mph through mountains of west virginia)

- Have noticed that the oil is over the full line on the dip stick when newly changed

and burns down to almost full then doesn't seem to move.

 

Is this consumption normal? Don't get me wrong, I'm not going to the dealer or anything for it, but I am curious. Is it caused by the short mileage trips, the pistion slap?

 

Jansen

asilverblazer Senior Enthusiast

asilverblazer

Posted
Posted

Because of your very short trips it sounds normal to me. The reason you can smell oil burning is it's burning off some that has collected. I would suggest taking a Saturday drive around the city, Interstate preferred, get it up to temperature, and do a few wide open throttles, clean that build up out.

dewfpo Senior Enthusiast

dewfpo

Posted
Posted

Yeah, your probably getting a lot of condensation in the engine with such short trips. As long as you get it good and hot every couple of weeks to evaporate off the condensate you should be fine. Winter will be worse than summer.

 

DEWFPO

ken1mod Senior Enthusiast

ken1mod

Posted
Posted

mercedes benz considers acceptable oil consumption of 1 qt per 1000 km. this is about 600 miles.

 

My 5.3 burns 1 qt per 5000 miles. I'm happy.

 

ken

C & A s Dad Senior Enthusiast

C & A s Dad

Posted
Posted

Have you recently changed your PCV valve? I am not expert on this but have read many post where someone changed the OE fixed orfice PCV valve to an old style PCV valve and they began having oil consumption issues.

 

I cannot be sure, but I think your 2004 came with a fixed orfice style. You may want to search this.

redvett Senior Enthusiast

redvett

Posted
Posted
Have you recently changed your PCV valve? I am not expert on this but have read many post where someone changed the OE fixed orfice PCV valve to an old style PCV valve and they began having oil consumption issues.

 

I cannot be sure, but I think your 2004 came with a fixed orfice style. You may want to search this.

 

 

 

 

Its built in on the 2004 M/Y and its a fixed orfice.

Jansen Enthusiast

Jansen

Posted
  • Author
Posted

I just want to make sure that with the short trips I don't do anything to hurt the engine. I have not checked the PCV valve, I'll do that soon. I recognize the need to get it out and get it good and warm. I need to make sure I start doing that.

 

Jansen

pm26 Senior Enthusiast

pm26

Posted
Posted
mercedes benz considers acceptable oil consumption of 1 qt per 1000 km.  this is about 600 miles.

 

My 5.3 burns 1 qt per 5000 miles.  I'm happy.

 

ken

 

 

 

 

Are you sure it is 1 quart per 600 miles? That is excessive by even the sloppiest of standards. I would think it would be acceptable on a model A Ford, but not a modern Mercedes.

redvett Senior Enthusiast

redvett

Posted
Posted

For some reason lots of people have the idea that an engine burning oil for any reason is a way of complaining that the engine is defective but really ALL engines burn oil and if you are complaining about 1 qt for 4-5000 miles you are way off base. 1 qt for 1000 miles is still OK. An engine has to burn oil to lubricate the upper cylinder bore and valve guides.

RobDarden Enthusiast

RobDarden

Posted
Posted

I have owned many Chevrolets. I have never had to add oil between oil changes. The Fords I have owned though - all the time.

jhm Senior Enthusiast

jhm

Posted
Posted
For some reason lots of people have the idea that an engine burning oil for any reason is a way of complaining that the engine is defective but really ALL engines burn oil and if you are complaining about 1 qt for 4-5000 miles you are way off base. 1 qt for 1000 miles is still OK. An engine has to burn oil to lubricate the upper cylinder bore and valve guides.

 

 

 

1 quart for 1000 miles??? That is absurd! I have never had to add a drop of oil between 3k mile changes. Most of my trips would fall under "short". What are we talking about here '72 Chevy Vegas?

Mr. Smith Enthusiast

Mr. Smith

Posted
Posted
For some reason lots of people have the idea that an engine burning oil for any reason is a way of complaining that the engine is defective but really ALL engines burn oil and if you are complaining about 1 qt for 4-5000 miles you are way off base. 1 qt for 1000 miles is still OK. An engine has to burn oil to lubricate the upper cylinder bore and valve guides.

 

 

 

1 quart for 1000 miles??? That is absurd! I have never had to add a drop of oil between 3k mile changes. Most of my trips would fall under "short". What are we talking about here '72 Chevy Vegas?

 

 

 

 

 

Facts are facts.

 

And while oil usage in the 1 quart per 1K seems alot really isn't. You would never see the smoke out the tailpipe.

NothinButBowTies Enthusiast

NothinButBowTies

Posted
Posted

Another thing that will determine oil consumption is how you drive the thing. I would kill to have a 7 mile commute every day (living in Houston, you can forget it). If you are flooring it at every light, the motor is going burn more oil.

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