Best Plugs and oil

[G40_FUNK]

Ok, im going to get my G serviced and that lamda probe looked into.  Thanks for all the helpful advice from members of this site.  I take it the best oil is quantum semi synthetic?  Im at a bit of a loss plugswise though!? There is a guy selling them on ebay, but are they the right type for a g40?

http://cgi.ebay.co.uk/BOSCH-SUPER4-SUPER-4-SPARK-PLUGS-POLO-COUPE-1-3-G40_W0QQitemZ370048111929QQihZ024QQcategoryZ9889QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[PeteG40]

w5dpo bosch

[hayesey]

no those aren't the right type in that ebay listing.  As Pete says, Bosch W5DPO (although I think they've been superceeded by part number something like WR5DP nowadays which is the same thing but with a resistor in it).  They are single electrode plugs with a platinum tip, cheaper ones will run too hot.  You can get away with cheaper ones in a standard g but it still wont do power any good.

[vwmk3jon]

ive just put some in i got from GSF. Not the W5DPO code but W5DTC or something like that. These rubbish? I had to change them badly as the ones i had in there were knackered!

What about using W4DPO's ?

[PeteG40]

w5rdpo (same as orig but with resistor have replaced the w5dpo i think)

[Andy]

Both Yoof and I found that running WR4DP0 plugs meant the cars started eating rotor arms (which also have a suppression resistor in them). We've both since switched to non-resistor plugs.

[vwmk3jon]

rotor arms aren't expensive though but cheers for the info. I'll get some W5's ordered in.

[Andy]

True, but it is annoying changing rotor arms at the side of the road if/when they properly go bang.

[vwmk3jon]

ah, didnt realise that they could go off like that! Don't really wanna find out either!

[Yoof]

NGK Plugs in my experience are far better...

I've got a few more sets to try then will be buying a batch and selling them- they're about half the price of Bosch too...

[PeteG40]

ngk equiv of w5dp0 are bp7evx and are about £20 a set!

[vwmk3jon]

That sounds more reasonable imo. I'll probably buy a set of the W5's just to give the engine a spring clean for the eaton conversion and then try a set of those to see if theres any difference.

[PeteG40]

some people in the past have had issues with ngks on relatively standard motors - i.ve used them and not had a problem personally.

[G40DAS]

I've been usig the NGK's too, didn't have a problem with them, but I do think they will need replacing more often than W5's. I'm back on Bosch currently.