blkjeeptj
Junior Member
- Joined
- Oct 18, 2013
- Posts
- 6
- Reaction score
- 4
- Ram Year
- 2003
- Engine
- Hemi 5.7
Ok, the results are in. I replaced the copper core plugs with Bosch P4's 2 years ago, against the advice of a couple of you on here. Fuel economy went down almost 2mpg over the course of the time they were in. I don't think performance was too badly affected... but maybe a little.
The plugs looked good (slight pale tan color on the insulator and a little darker at the tip).
Changed back to stock plugs last week and already getting back near 18mpg (highway).
2003 1500 SLT 4X4, Crew, 20 in. wheel package. 171,*** miles
The plugs looked good (slight pale tan color on the insulator and a little darker at the tip).
Changed back to stock plugs last week and already getting back near 18mpg (highway).
2003 1500 SLT 4X4, Crew, 20 in. wheel package. 171,*** miles
