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Hello all

My name is Justin i have a 2010 focus I've done a lot of work to it myself ,
I have a quick question what spark plugs is the best for mine I'm running NGK 92714 {#TR6AHX} Ruthenium HX High Ignitability
but i don't notice much of a difference should i go to laser ngks?
 

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2012 Focus SE hatchback black
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Welcome to the forum.
In a modern NA car you won't notice a difference with different plugs(nickel/copper, platinum, double platinum, iridium, etc). It's really just how long they will last for. One type of plug design isn't going to give you more HP than another in a sub 200hp modern 4 cylinder engine. If you have a modern FI car like a factory turbo then some manufacturers actually specify nickel/copper plugs and if you have a 1200hp race engine then yeah nickel/copper plugs should be used. However, the ruthenium plugs that you bought were really just a very expensive waste of $. A platinum or double platinum plug will last for about 80k-100k miles. Iridium just a bit more.
 
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