Hi Folks. Looking to replace spark plugs on my SC. (It's done over 70,000 miles now). What're the best ones without going overboard?
I'm leaning toward NGK (IFR5N10) but not sure whether to opt for posher Bosch jobs which appear to be substantially dearer.
No LPG conversion. Previous cars:
S-Max 2007-2013 (only diesel I've had, good car but expensive when diesely bits go wrong, so what's the point?)
Galaxy 2001-2007
Mondeo Estate 1997-2001
Sierra Estate 1993-1997
Uno Turbo 1987 -1993
Fiesta 1984 - 1987
Fiat 127 1982 - 1984

I stick with the OEM recommended NGK IFR5N10 (7866) in my 4.2SC.

I'm also curious if anyone else here has used other brands/model spark plugs with good results. 2010 RR SC
2007 RR SC

I guess it'll be the NGK ones then. If they are OEM and have lasted this long, then I can't really go wrong! Previous cars:
S-Max 2007-2013 (only diesel I've had, good car but expensive when diesely bits go wrong, so what's the point?)
Galaxy 2001-2007
Mondeo Estate 1997-2001
Sierra Estate 1993-1997
Uno Turbo 1987 -1993
Fiesta 1984 - 1987
Fiat 127 1982 - 1984