Thanks, all, for the comments. To clarify, - I do know about importance of cyl. to cyl. variation - the engine was warm - I did recheck after injecting oil ... readings went up about 10 psi. - the car does start and run, but when driven feels like there is at least one weak cylinder, maybe two. I was checking compression to see if I'd find a couploe of weak ones ... there were a couple down in the 85 range. But see the following: The starter was cranking rather slow (this with all plugs removed), and its speed varied a bit, so that could have affected the readings. After attending to the starter, I'll recheck the compression. Appreciate all the inputs, though only one person answered the query with an actual number! LOL. Park Waldrop [Non-text portions of this message have been removed]