i want to change my spark plugs and was willing to change with bosch platinum 4+ spark plugs.
I have been using the same plugs in my 1.6gli auto corolla which was also on cng. the plugs worked well for 3-4 months. but then the car started giving me poor averages. i am intrested in 4 points plugs as the pickup got better on cng and the car was smooth.
now i was thinking to change with the same plugs in honda civic 2005. but was again worried for the problem occured before with corolla. Any better 4 points plugs you can suggest.