- Buick Ownership
- 2003 Buick Park Avenue
Looking for the best replacement spark plugs for my 2003 PA. Have used Bosch 2+ Platinum and AC Delco Iridium plugs in the past. Currently, I am using the AC Delco Iridium plugs for about 50,000 miles and have experienced a misfire on cylinder number 5 when the weather is wet. Probably will be replacing the wires at the same time. I would appreciate any referrals and suggestions for the best plugs and wires to use. Thanks.