What is the difference b/w BP5EY & BP6EY spark plugs.
i went for tuning of my ALTO yesterday. Mechanic told me that spark plugs are weak.
he installed new NGK plugs (BP6EY).
I have noticed the difference between new & old spark plugs numbers. Old one's number was BP5EY.
i asked the mechanic that these are not the correct plugs but he told me that BP6EY are also suitable for ALTO.
What u ppl say?