In Boulder, CO, the days when Boulder drivers changed their spark plugs every couple of years has ended. Back in the day, spark plugs really did wear out that often. A couple of things are different n...
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Question:I'm confused about when I should get my spark plugs replaced. What's the deal?Answer from John's 4X4 Center:Well, it can be confusing for Boulder drivers because there ar...
The days when you changed your spark plugs every couple of years has ended. Back in the day, spark plugs really did wear out that often. A couple of things are different now. First, ...
