I did replace the original spark plugs with acdelco platinum plugs advanced auto said they were the oem plugs that came installed in the engine. After about 30k miles I noticed the engine running rough and starting hard so I thought it was time to check the spark plugs. When I took the easy side 3 spark plugs out they were extremely yellowed and had rust colored deposits on the ground. I looked online and found out that the plugs where overheating henchmen the yellowing and rust colored deposits. I went to get the same plugs and they do not make them anymore not the exact same ones and also the acdelco all have high heat ranges so I figured that's why they overheated. My dad always uses the NGK plugs and they last forever and the g-power ones have a heat range a lot lower than the acdelco so I thought I would try them. And thanks for letting me know about the spark gap I just wanted to know if what they said on the one website was true.