I've used Bosch, Beru, and Denso iridium. The Denso were a bad choice. 25k in and I got a CEL- misfire. The tip had been burned off. I replaced that plug and it fixed the misfire, but I must suspect that the other plugs are in bad shape. I'll replace all of them soon w/ Bosch. Between Bosch and Beru, I've found no difference. At 60k I'll swap them, even though they look fine and I've never had any plug-related problems. At the local Advance auto, they will compete on price and sell the Bosch at $6.99 per plug.
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Rennzenn
Jfro@rennzenn.com
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