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How to tell if they help

I had two 4 cylinder cars and synthetic oil helped as did better gas (no ethanol) and when going up the mountain we travel daily in 5th gear the improved performance was easy to see/feel. Also I went up an MPG or two.

As for plugs I don't know but just like tweaks you can tell if there is a difference or not when you use the right test scenario. My guess is they may help.

Do you keep mileage logs? Do you have a manual or automatic? By leaving the vehicle in fifth as I climb the mountain performance is easy/easier to judge

Good luck!


ET
ET

"If at first you don't succeed, keep on sucking till you do suck seed" - Curly Howard 1936


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  • How to tell if they help - Awe-d-o-file 10:43:57 09/16/14 (0)

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