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United Kingdom, Belfast
1 Level
732 Review
40 Karma

Review on NGK 5306 Spark Plug: Optimize Your Engine's Performance by Tyler Smith

Revainrating 5 out of 5

2007 Dodge Ram 1500 SLT RWD 5.7 hemi

My mechanic had no problem connecting them. They came ready to install with the correct clearance the truck said they should have. I immediately noticed the difference. My gas mileage went from 12.5 on the highway to 17.5-18 mpg. And from 9.9 mph to 12 mpg in the city. My Ram took 16 of these spark plugs.

Pros
  • Enjoy
Cons
  • No power