In between oil changes every 3500 miles, my 2010 Club Wagon is losing about 3 qts of oil. There is NO visible oil leak, NO smoke and NO oil or soot in the tailpipe. Where is the oil going? 264,000 miles

 

How does the coolant look and how is the coolant level?

 

Actually, it looks a little brown and it's a bit oily to the touch.

 

The level is a little low.

 

It is mostly clear though, not milky and no oil spots that I could see. Also, I discovered today during my oil change that the used oil filter was too small. (I did not perform the last oil change and was not there to supervise)

 

When you did your last oil change , how dd the bottom of the engine look?

 

I did the oil change myself yesterday. The bottom of the engine looks fine. No visible oil or leak. I’m starting to suspect whomever did the last oil change only put 3 qts nstead of 6. They did put the wrong size filter after all.

 

You could be 100% correct and sometimes the help is responsible, but at least now you know to keep an eye on the oil level.
Unfortunately, some places have problems getting good help and things like this do happen.
If you can, we would like to know if your theory was correct. Thanks.

 

I’ll definitely keep an eye on it and let you know. Thanks for your time and input!