Not being able to sleep and bored I did some research on oil consumption. The internet really has a lot of info. on it if you ask it nice, it will actually deliver it to you. The following search was one of them.
There is plenty of things to read, there were some 31 million results. That should keep some one busy.
Light weight oil in general has the fickle finger of fate pointed at it. Of course that is hedged by saying.
The factory recommended the light wieght oil!
I am sure some where in the 31 million results is the fact the reason the oil was recommended was gasoline mileage is enhanced by light weight oil, while light weight oil used under summer or regional heat on a car driven hard causes premature wear and excessive oil consumption.
Hell of a deal, you get good gas mileage!!!!!
Everyone is happy. Specially the factory! The warrenty is off and they are off the hook.
This brings about a series of solutions to possibly ignore the need to rebuilt the engine.
One of which is to use "high mileage oil" Something that will help high mileage engines.
But probably is little more than a can with words on it that lets people think it is good for the car thus buy it. The purpose of the oil? To remove money from your wallet.
Another is a piston soak.
Done something like pull all spark plugs, pore in any of the following,
SeaFoam (an engine cleaner like many although this has a funny name)
Marvel Mystery Oil (available for years in gallon cans used for general engine cleaning and assored mystery fixes)
A GM supplied top engine cleaner - go read one of the articals, you find the name.
or other stuff.
The purpose? To free up stuck piston rings. Let it soak for 20 min, repeat a second time and then?
Change the oil. All that raspy stuff is not in the crank case disolving sludge and gaskets.
Will it work? It might, if you have stuck piston rings.
But most of the time, the reason for the excessive oil consumption is!!!!!
The light weight oil used for maximum gasoline mileage also causes maximum engine wear as a function of time and use.
I really have not had the problem.
I am old school, when the recommendations came out my initial reaction was the use of the 5W20 oil year around was stupid.
I drive mucho miles and keep cars a long time.
I build them, I restore them and I build my own street racer motors.
Every car I own was changed immediatly to a recommended oil viscosity that comes from a viscosity vs temperature chart that can be found in an owners manual of the car or an Oil Company data sheet.
Similar to any one of these:
Or if your garage is like mine you have a collection of Motors or Chilton manuals, mine go back to 1936 so I can use them to repair a Marmon, if I had one. And look at the oil recommendation for the same engine over the years.
I am currently building a 350 Chevy V8. An engine that has remarkable interchangability with the first one built in 1955, the infamouse 265 Cu In Power Pack mouse motor, and look up the specks. Most manufactures started recommending a light weight oil all about the same time when gasoline mileage became an EPA issue and a sticker on the window rates estimated mileage.
And warrenties stopped covering them after 30 thousand miles.
A complaint to the dealer that you are using oil after the warrenty is up is generally responded with;
If you are using the factory recommended oil, thus the 5W20 the answer is NOT you are using oil, the oil usage is normal.
What is not being said, is excessive usage of oil is normal when using a light weight oil year around. That is how I blew the engine up in my 1st car in the middle of the summer. That and stupidity.
If you are using excessive oil, the damage has been done.
It is rare that motor fix it in a can can fix anything.
There is a mechanical problem that needs replacement parts because they are worn.
If you catch it in time, oil usage may slow down and may even slow down a lot. By changing to a heavier weight oil
Can't help you, you are not alone. It is now and industry standard.
Sorry about that.
But I do not have the problem in my own cars. I changed to a heavier weight oil on the 1st oil change or if I built a motor I started out with it.
I live where 20W50 is a viable alternative. That is what I use. Except my Chrysler which uses synthetic and I use 15 W 50 and nothing I own uses oil.
Well not true, my Pony Car with a monster engine does, but I let the heads sit on the shelf too long before I installed them and the valve umbrellas dried out, so it is sucking oil through the valve guides.
But oil is cheap compared to taking it apart.
So I do not worry about it.