Anyone used NGK BKR6EIX spark plugs on their X5?
Posted: Tue Jul 10, 2012 10:10 pm
i am planning on changing the spark plugs in my X and it looks like it could either be BKR6EQUP or BKR6EIX which is the laser iridium type. i think that iridium is better but i want to see if anyone used them in their vehicles before to make the decision.