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[MartinP]

Which plugs should I be using?

Currently do approximately 250 mile/week

95% on LPG.

Changed the plugs for a less worn used det, so now I need to buy the right ones.

Martin

[VXL V6]

Think Marks DTM recomends the twin electrode GM ones for LPG.

[Kevin Wood]

Standard GM plugs are fine on LPG. No need for anything exotic.

Kevin

[feeutfo]

Stock 4electrode here, no issues...except they worked loose on the 246 bank, ESP 4 that was giving a miss fire code, soot all round the base and the coil PAC rubber, undid it by hand with plug socket and extention. 

...not an LPG plug related issue, but Master dtm has since mentioned torquing to 25nm, which I'm fairly sure I did, but also going back over them all 6 once again with the torque wrench as the crush washer can sometimes relax...I know I did not do that when fitting the loose ones.

Other than that the plugs looked in very good nic after 30k. But replaced like for like again while in there.

Hth

[PhilRich]

Just the stock  Bosch twin electrode on mine & no issues at all

[tunnie]

stock GM twins here, done about 30k miles (13k on LPG) - No issues 

[MartinP]

Thanks all, job when I get back from hols.

Martin

[DodgeyDave]

I've used the standard GM ones and done 70K in last 2 years, 99.9% on LPG, no issues at all