Quote:
Originally posted by hobieboy
Bosch & NGK uses different numbering scheme.
NGK plugs - smaller # is colder (7 is colder than 8).
Bosch is reversed.
I think a NGK BP8 range is similar to Bosch WR4 range.
|
Actually, it's the other way around with NGK. The lower number is hotter and higher is colder. The link to NGK's chart, that KCPSG posted, confirms this. I couldn't figure out which would work best for me so I just bought a set of BP7ES and BP8ES plugs.
