dyna
NAXJA Forum User
- Location
- central coast Ca
For the second time in my years of driving I have installed a set of bosch plugs in a car. This time the XJ. The results are the same, lost 2-3 mpg and 150 rpm at idle and general powerless running. The last set was in a 4x4 suburban and it went from 10 mpg to 7. now the chero is down to 12 mpg.Anyone else run these?