I have a 2004 Toyota Sienna with 124K that has been and is running perfectly as far as I can tell. It starts up easily and fuel economy has been steady since day 1. I am coming up on the recommended 125K spark plug change and wondering if this is worth the $500 my dealer charges for the job? I tend towards if it isn’t broke don’t fix it, but don’t want to penny wise, pound foolish. Any thoughts or recommendations will be greatly appreciated!
p.s. My dealer isn’t sure if the Denso plugs are platinum or irridium. They said if they are platinum, they would only be good for 60-80k while the irridium would be good for 125k. I am thinking that it would be worthwhile to buy the plugs myself since they aren’t sure. Does anyone know what would be the best plugs for my vehicle? Thanks!