best spark plug for 1999 audi a6 2.8
Ever struggle with hesitation or rough idling in your 1999 Audi A6 2.8? From my own testing, I’ve found that the secret is a high-quality spark plug that resists fouling and provides a crisp, consistent spark. After personally trying several options, I know it makes a huge difference—smooth acceleration, better fuel efficiency, and less engine … Read more