 There's no reason to change them. I'm not going to. The electrode's not burnt. They're not fouled. There's no reason to change them. In fact, I bought some new plugs, put in there when I went through and just looked at the engine and painted everything. And the new plugs didn't really work as well. They just didn't seem right. So I put the old plugs back in and they're still in there. So I got the spare set, but I'm keeping the old ones because they work fine.