Have a 2002 4 cylinder outback. I know vehicle calls for resistor plugs but i am tired of changing them every 30 k. Can anyone recomend a premium platinum plug for this engine. Should I use twin electrode no gap plugs or single electrode.

I just put in a set of ngk iridium plugs in my '92 turbo legacy and they are said to last quite a while even though they cost a little bit more.

Because of the way that Subaru engines fire, you'll need 'double-platinum', instead of the slightly cheaper 'single-platinum'.

t i am tired of changing them every 30 k.

what brand are you using? what does the owners manual call for?

 

if you stick with the stock OEM NGK's you shouldn't have a problem.

 

should be an EJ25 (2.5 liter) - are you running premium fuel?

 

how many miles? have the wires ever been replaced?

Because of the way that Subaru engines fire, you'll need 'double-platinum', instead of the slightly cheaper 'single-platinum'.

 

 

Before I joined this forum, I put Bosch single electrode platinums in my 99

OBW with 2.5 motor. I have put about 12K miles on those plugs and new wires. My car seems to run just fine on the Bosch singles and regular 87 octane gas.

 

I am surprised that you are only getting about 30K miles on plugs. The plugs that I pulled out of my 99 when bought as a used car, had the original plugs and wires with 150K miles. Even so, the car really didn't run that bad.

it's also important to know that they don't necessarily come pre-gapped from the store.

 

you have to gap them to your application -which for your car i believe is 0.44"...but the store/owners manual/FSM/USMB can tell you for sure. make sure they're properly gapped.

what brand are you using? what does the owners manual call for?

 

if you stick with the stock OEM NGK's you shouldn't have a problem.

 

should be an EJ25 (2.5 liter) - are you running premium fuel?

 

how many miles? have the wires ever been replaced?

Yes, EJ25 Engine. Wires are new. 118k. Looking at NGK Iridium