Does anyone know for sure which plugs to use and how often to replace them?
In the Owner's Handbook it states that 2.5i non turbo are NGK PFR5B-11 (double platinum) in Europe, and Champion RC10YC4 (copper) for other models.
Presumably we fit into the latter category and are fitted with the Champion copper plugs?
It's confusing because in the Warranty & Service handbook it states "Spark Plugs (Turbo 50,000Kms, 2001-On Turbo, 6 Cyl & 2.5 DOHC 100,000Kms)" Then it ticks the sparkplugs as being needed at intervals 2,3 & 4 (25/50/100Kms respectively). So which interval is for which engine? The 2.5i (SOHC) which is what we have, isn't even mentioned!
Also has anyone changed these plugs themselves and can give an idea of DIY difficulty? Thanks
EDIT: The other confusing thing is that the LegacyGT (north American) owners who have a 2.5i non-turbo allude to the fact that they have platinum plugs as stock, that last 60,000MILES (100,000Kms). Going by our owner's handbook, only the European models get the platinum???