Edited on 2012-03-04 0:18:49

Edited on 2012-03-03 4:41:02

What type and brand of spark plug runs best in the 1990 Jaguar XJS? I recall with the 1987 Jaguar XJ6 cars that the old basic Champion copper spark plug was the best running versus the newer style spark plug types. I know that some major Jaguar restoration shops prefer the copper NGK.

Thanks,

Scott

1990 Jaguar XJS Convertible (for sale)
1997 Jaguar XK8 Convertible
2001 Jaguar S Type 4.0

Update: I have been able to confirm the proper spark plug is NGK #1094
(BR7EFS).