Getting some plugs fitted tomorrow from my local garage and just wanted to know (with all the issues on here about loose plugs etc) if the torque setting was a hard and fast rule?

From searching the torque setting should be between 18-20 is this right?

It is only the NGK OEM Platinums that are going in....

 

18 lb/ft IIRC

 

I do mine to 20 ft/lbs.

 

All in now - garage man thought it didn't sound too tight but told him to button it and do it anyway!

If this is wrong someone shout now or forever hold your peace....