Not entirely on plugs, but I'm a little confused about a couple of posts above.

One says higher nitro, lower running temp, and another says lower nitro, lower temp. Which is it?

I'm particularly interested because I've just taken delivery of a couple of RCV 60-SP's which I believe run hotter than most engines, but the recommended fuel is 10% nitro. Maybe I could increase the nitro and keep the temp lower, but the manufacturer recommends 10%.

Can anybody help?

On the subject of plugs, I have about three gallons through one engine with no change of plug.