Thanks Dave, The plugs I pulled today are BP 6 ES. I cleaned and regapped them at .032" for the run up north tomorrow. I usually run them at .035" in my 240 when new but seeing as these are used and worn somewhat I thought I would tighten things up a bit. Just a little hedging and guessing on my part. I'll pull them tomorrow night and see what they look like. Another note; After my drive Thursday morning the 308 idled smoothly with no popping. A good sign.