Spark plug Autolite or Motorcraft

Autolite Spark plug
PrudentConclusion248
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Rating 4.0

These are good plugs Autolite my mechanic recommended them to me good spark and seems like my truck is running smoothly and there a good price.

Pros: good spark, running smoothly
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Motorcraft Spark plug

Has anyone tried the Motorcraft SP594 plugs? They supercede from the SP542, which is said to be a 1 step colder plug for our cars. Currently running NGK 6510s but i think i got a "fake" set as i paid like $30 from Amazon for them. The SP594s I can get for $41 from Ford... so anyone have good results?

Part number: SP594
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Autolite Spark plug

Make sure if you purchase spark plugs that it is not Auto Light. They tend to mess your vehicle up more and not work well with Toyotas.

Cons: mess up vehicle, not work well
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