I'd stick with Cu and use the one w/o the "0". That's what I use which is perfect up to 100mi/hr as per CD. The "0" just means a larger electrode diameter.

It appears you should be using H9DC. I'm looking at the chart and H8DC should be used for "Basic and national version except AUS, J, and USA. H9DC is spec'd for Low Compression for those areas, but are for normal for ours.

cheers,

__________________
sjsfiji

'87 W124 260E (DD)
98K orig. mi. @7/15
CLK 7-Spoke Forged Wheels
Neuspeed springs/Bilstein Sport
4/3 bump (F/R)

'97 993 Carrera
106K orig. mi.
Always driven like it's stolen