I use NGK Laser Iridium - 94201 - SILZKGR8B8S . Spark Plugs. I am also Methanol/Water Injected. My recent go-round with these plugs were 5 years & 10 Months / 17,442 miles. I hear alot about counterfeit Spark Plugs. At $30/ Plug I'm not looking to get burned. Do you think sandblasted Spark Plugs would be sufficient for "Side of the Road" repairs ? The plugs I bought @ Advanced seem good, I'm thinking Summit would be acceptable but I have questions about Ebay. Can you think of any reputable chains that would have an acceptable product ? Please & Thank You