you can get upto 100,000 miles on a set of plugs
Only if there's something wrong with your old spark plugs.
Yes.Yes.
100K
Change the plugs and plug wires at around 100,000 miles or earlier if you detect a miss or loss in performance of mileage.
Changing your spark plugs could theoretically make your car faster but not enough to make a noticeable difference. Changing your spark plugs when they are worn will increase your fuel mileage slightly.
EVERY 60K
Every 100 000km
If they were real dirty, yes.
If they are dirty, yes.
Brands such as NGK, and Bosh both make plugs that are said to help gas mileage.
Gradual lack of power Fuel mileage drops Mileage/age of vehicle Gradual lack of power Fuel mileage drops Mileage/age of vehicle
bad gas mileage, hard starting, and basically bad performance.