Okay guys so heres the deal
I have a 2004 vitz auto trans on petrol. So far i havent done any mods as far as the engine is concerned except for the regular oil / filter changing
I have theses 4 tip spark plugs that my brother used on this civic and now has taken off cuz hes got cng installed.
Now heres my question
Since they are 'sports' plugs, will they be able to improve my cars fuel efficiency? i mean will i be able to save some fuel as well as get better performance from my engine or not?
Im attaching a couple of pics of the plugs not sure if they are clearly visible
Thanks in advance for your help