Okay...final note on this one...
The newly replaced fuel pump cured the issue. I was skeptical after three 4149 fuel pumps from two counter vendors (Advance and Autozone), but all three went bad almost immediately. Maybe there is little call for these and they dry-rot on the shelves? I don't know, but three over a years' time, that seems pretty silly.
At any rate, took a very long drive this weekend. No volume increase and no fuel smell in the oil any more.
Many thanks for your suggestions and encouragement.
Jim
