Can anyone shed any light on the rate my mrs Fiesta uses / loses oil? I can't see any leaks so I assume she's burning oil. She neglects to check it, and it went below the low mark on the dipstick a couple of times. She bought "oil" from a petrol station, probably not the recommended type. It runs fine other than that.
I wonder if an oil change and replacement with the right stuff would sort it.
Thanks for any input!
Mrk