2004 Mercury Grand Marquis Q&A

2004 Mercury Grand Marquis Question: NGK iridium IX spark plugs OK or is there a better brand?

Trying to increase gas mileage- local 9-10mpg short hwy. - 13 long (100 miles) hwy.-25! -
Answer 1
Use OEM for the best results. Motorcraft fortunately is available at the aftermarket stores like carquest etc... -
Comment 1
Thank you,will do. -