The original spark plugs were fairly good Champion
RC9YG, but the heavy mileage (about 35.000km), they've been substituted
with good Bosh Super Cu-Electrode Thermo Elastic, whith copper electrode,
as you can see in the figure above. The model is 0,7 mm, so a perfect aftermarket
product in substitution of the originals, siglated F7DC.
