1996 850 B5202S engine oil/spark plugs

[precopster]

It's ok Erik, everyone's entitled to an opinion

If you read my thread I have tried multi prong NGKs for non turbos with no dramas. I can't believe that Volvo make their own plugs in the Volvo factory. There MUST be a manufacturer that supplies for them. If it's not the NGKs I mentioned, then they are a pretty good match for the OEM multi prongs.

For turbos the factory fits single prong so that is an entirely different conversation.

[erikv11]

I don't know if you can get NGK Iridium in Denmark, but give it a try.

I installed the NGK Iridium BKR6EIX in my Volvos (1998 S70 and 2005 XC90).
Great spark plugs, good for 80K-100K miles.

Detail below...

DIY: 2005 XC90 2.5T Spark Plugs using NGK Iridium BKR6EIX
https://www.matthewsvolvosite.com/forums ... hp?t=64080

I know you love those plugs. So you recommend them for non-turbos now, too?

[cn90]

NGK website lists Iridium (among others) for both turbo and non-turbo.

https://www.ngk.com/Automotive-NGK-l1411.aspx

[Teddy1975]

Heh, I like when you get a bit of a discussion out of asking a question.

So to summarize the info I got from here, multi-prong plugs are bad, unless they are either Volvo OE or NGK. The NGK will be more expensive ($55 incl intl shipping) for me to get here than the Volvo OEs ($35, no shipping required), so I'll get the OE.

[erikv11]

NGK website lists Iridium (among others) for both turbo and non-turbo. ...

LOL yes, of course NGK recommends a plug from their factory. I asked if *you* are recommending them; so you are saying the reason you do is because NGK does?? Not a big deal, just curious.

[cn90]

Yes,

We discussed this topic many times here:
- NGK Copper $2/each: lifespan about 25K.
- NGK Iridium $7/each, lifespan about 100K.

I have photos of NGK Copper at 30K, the gap has widened.
I have photos of NGK Iridium at 60K: gap is still within spec. However, even when using Iridium, I usually remove them at 50K just to clean the spark plugs threads, applying antiseize to prevent galling, and re-install them. At 100K, I replace them.

From the material $ stand point, it costs the same over 100K, but the gradual deterioration has a negative effect on fuel economy that is not obvious to people, so people lose money from inefficient combustion of gasoline.

[misha]

... I can't believe that Volvo make their own plugs in the Volvo factory. There MUST be a manufacturer that supplies for them. If it's not the NGKs I mentioned, then they are a pretty good match for the OEM multi prongs....

Yes there is a manufacturer who supplies Volvo with spark plugs.It's French Eyquem.
Eyquem # RFC 52 LS3.
On spark plug itself (on metal round part)is stamped 9146775 which is Oem Volvo No.for triple prong Volvo spark plugs.

[erikv11]

Yes, ...

Alas, I am facing multiple fails to get my point across in this thread

I will try to spell out my question, all in one post:
You seem to love NGK Iridium BKR6EIX.
You have recommended NGK Iridium BKR6EIX strongly for turbo motors.
Do you now recommend NGK Iridium BKR6EIX for non-turbo motors, too?

This question is not at all about why you love the NGK iridiums, it is about fitment. That's all, just one question, thanks!

[cn90]

Yes in one word.

[erikv11]

Thank you! I am surprised it is the same plug with or without turbo, very interesting, good to know.