I know that changeing spark plugs will get me better gas mileage…will changeing my spark plug wires? I have a 99 Saturn.
It could. If those wires are the originals then I would change them also, no doubt about it.
Actually changing spark plugs will only increase your mileage once they are starting to fail. Which is about the recommended replacement time.
Replacing plug wires will only help mileage if they are starting to fail. It seems few people pay much attention to plug wires. They should.
Some cars are more sensitive than others to plug wires, the wrong wires can cause problems when new. I suggest getting OEM replacements. Don’t go looking for and paying for designer wires. They are not better for normal drivers and are actually more likely to fail.