I have a number 8 Griswold big logo (no heat ring) that I use to cook eggs. It does really good with no stick at all. I cook on medium heat with a little of oil and butter. I recently cleaned up and seasoned a #7 Erie Nickel Plated with a heat ring. It has a really nice seasoning and has a super smooth cooking surface. I tried cooking eggs on medium heat using oil and butter also and my eggs stuck. Right after that I cooked some more eggs on a medium/low temperature only using oil and my eggs did not stick at all. Has anyone else noticed different cooking temperatures for different pans? Could the heat ring help hold a higher temperatures on my Erie?