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Hi guys,
I have a general question regarding spark plugs.
I currently run bosch platinum on my 97 Escort and have put appr. 50-60K miles on them with steady gas mileage of 29-30 mpg. Does anybody have experience how long do these plugs last with average commute use? I have 162K miles on my odometer and have wondered when are the plugs due for replacement. By the way, great choice are those BP. I have never had problems with them and my gas mileage jumps occasionally to 38 on the highway.
Please share your thoughts.
Thanks
 

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Single electrode platiums are fine, stay away from the multi electrode. I ran the Platinum +4 once. It ran GREAT for about a month, on day 31 (about 1000 miles later) it ran worse than it did on the old plugs i took out with about 85k miles on them.
 
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