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Speaking of additives, does anyone have any accurate data on mileage improvement using additives/cetane boosters? I have read where many say 1-2 mpg increase. I haven't driven the 6.5 enough to get any real numbers, but using PS silver cetane booster in my Ford (when it runs!) actually seems to...

Checking resistance is pretty much useless. I've seen a number of plugs which would go open after heating up. I also had one check good with an ohmmeter in one of my old 5.7's which had lost it's tip! The method described by GMCTD is the only surefire way to test.

I'll stick around where the most knowledgeable people are. After all, that's what it's all about, people with knowledge being kind enough to share it with us all. It looks like a huge chunk of that knowledge just moved here!

Improving 6.5 Mileage Work is currently in progress. If everyone will post their thoughts, ideas, sugestions, real world experiences, facts, figures, numbers, data, links and anything else you might feel useful to this topic, I'll try to compile most of it in a easy to use format we can all...

Our prayers are with you.

How about a section for fuel mileage improvements. This seems to be a hot topic for all of us at current fuel prices. There's lots for all of us to learn on this subject. Any interest here?

OK boys and girls. I missed the bus but found my way here anyhow. Long way to hitchhike!