[GaKu]

Any experiences on specific spark plugs providing better fuel economy on a 1.4 Fd?

I have bosch super in the car currently. Done only 15000kms in 3 years but am thinking of changing them to get better economy.

Does anyone remember the brand of factory fitted plugs?

[mickd]

Doesn't it have that in the owners manual.
More fuel efficient plugs ? ?   

[CraigB]

Bosch are one of the best plugs anyway

Changed every 100,000km if I remember correctly 

[GaKu]

I came across a FIAT forum with a lot of discussion comparing NGK vs Bosch with regards to power and fuel economy and some of it was around the engine design.
So started wondering if anything of that sort was true for the FD.

[CraigB]

Only difference you would notice is if replacing worn out plugs for new, whether it's NGK - Bosch - ACDelco - Champion - you wont see a difference with Iridium plugs.