I am putting in new plugs in hopes to have my car run a little more efficiently. I am looking at Bosch because they are most readily available. I can also get NGK, Autolite, Champion). I was looking at the Bosch platinum 4 and the Bosch Ir Fusion. Which plug is going to be better for preformance and gas milage? I really dont care which last longer as they both will last 50k+ miles. I know the Platinum 4 is cheaper but it is a better preforming plug? I figured the Ir Fusion is just a longer lasting plug but correct me if i am wrong. I just dont want to buy the wrong plugs at $10 a piece.

The NGK, and make sure you get the right heat range!

What plugs were in it ?.........Name means price not performance......most imports use Bosch or NGK both are good....and are about the same in performence just difference in price.........