I recently got a valve job, around mid-late last year, because I had to put oil every 500miles.
The mechanic stated that it was probably needed a seal replacement. However, he said that to do the complete job and ensure that I don't have to put oil anymore he recommended a valve job. Expensive!

So I decided to get one.
Well, the first oil and filter change, I didnt' have to add oil. He used 20-50W.
The next time, I changed the oil and filter and used 5-30W. After 1000 miles, I had to put oil.
Now he is saying that it is the rings that is causing the problem, since it has so much miles? He recommended I use a heavier weight oil. So I used 20-50W.

Did he rip me off or not? Is he telling the truth?
I did use 20-50w the last time and that seemed to last longer. I had to put oil after 2500miles (I think it was 2500miles???).

Joseph