Just changed plugs at 30,375 miles. Book says 30,000 miles. The plugs I took out had no deposits, gap was as specification and looked clean as new except for heat discoloration. Any one know why Jeep recommends change at 30,000.
I had a 92 XJ until 235,000 MILES and the book said to change every 60,000 miles. I did like clockwork and the old 4.0 litre performed great up to the day I sold it. So why, with newer technology does Jeep recommend 30,000 for the 06 WK 4.7 litre?
Anyone:???:
I had a 92 XJ until 235,000 MILES and the book said to change every 60,000 miles. I did like clockwork and the old 4.0 litre performed great up to the day I sold it. So why, with newer technology does Jeep recommend 30,000 for the 06 WK 4.7 litre?
Anyone:???:
