goems279

1.wrong! spark plug last much longer than stated. platinum plug will last even longer,at least 100,000 miles or 150,000 km just take it out once a while and look at it!  4.even more wrong! electricity flow from - to + in your car !!!  you can read up on the subject if you want. having 2 ground will not make your spark any weaker because you only have 1 spark at a time!