I neglected to say anything about what it means if the readings do come up. I didn't say that the rings would be fine if they did come up as you imply I did in your second point. I think you misunderstood my comment, and just assumed that.
When I said, "If you don't do this, you can end up with low readings", I meant that it may be the case if the rings are worn, and it will result in those low readings.
It has been standard practice to use a little oil in the cylinder to see if that does happen. It is a check to see if the readings do come up, meaning that perhaps the compression rings are faulty; or if the values don't come up, valves are most likely dodgy.
1989 Milano, Shankle Sport
1991 164S, stock
1994 164LS (~Q)
1972 Morgan 27
previously owned since 1964:
62 Morris MiniMinor 850, 67 Austin 1275 Cooper S (Downton 3/4 race), 64 Giulia Sprint GT (1st red one made), 72 Fiat 128 Sedan, 75 Alfetta Sedan, 78 Alfetta Sedan, 78 GTV, 81 GTV6, 86 GTV6
Last edited by Del; 02-18-2015 at 09:05 PM.