what Platinum spark plugs are the best for my 1.5L engine NGK, Bosch or Denso.What the correct plug number and price.Will the platinum plugs make any HP.
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I believe denso and NGK are better b/c they are slightly longer than the bosch. As for platinum I don't know what to tell ya. I use regular double spark densos on my z5 and the car runs just fine. The Z5 isn't known to produce all that much horsepower (90 hp, I believe) and I seriously doubt you will gain any hp from just sparkplugs and/or spark plug wiring. -
ps I believe platinum plugs Last longer, that's about it.Comment
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Get the NGK, change them as directed...nothing else offers a significant improvement for the expense.
Apples to oranges...I was really disappointed with Bosch double platinum in my old SE-R. Switched to standard NGK and there was a noticeable improvement.Comment
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It's a Z5, you're not going to get any power gains.Comment
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