Mine are supposed to be changed at 16k, but I was lazy and didn't change them until around 20k. Still ran perfectly fine though and the old plugs still looked great
No kidding.... I use the NGK Iridiums in mine too since that's what it comes with stock and what the manual calls for, and since the dealer wants about $20.00 each :yikes: , I looked elsewhere and I think the cheapest I found was sparkplugs.com for $11 each. Still pretty damn expensive!Gas Man said:Yes they are... at LEAST! But they are very nice!!!