Tim, thanks so much for those images/links! Based on what Alvin and Grigg say, I think my oil gauge connection is on borrowed time. I could not find a replacement so I reused the old one, and I had to drill it to just get the copper pipe through it. I bet it was too small to fit the tube because it was already compressed. Although it hasn't leaked yet I bet a bit of vibration will create an oil shower on my shoes! Using Tim's link I was able to phone the local Napa store and get a few ordered in this afternoon.
