[Roland S]

what type of lubricant do you use to lubricate quick connectors? i'm guessing petroleum type grease would rot the o rings? any suggestions?

[BDCS]

I spit on mine before insertion 

There should be no issue with the o rings with a petroleum grease - even the black ones ! sorry non viton ones ( will I get grassed for that Roger ? ) . Grease will attract grit.

[chris scott]

http://www.ebay.co.uk/itm/Wynns-Silicone-Lubricant-52579-Dry-Lubrication-Aerosol-Spray-/261022134989?pt=UK_Vehicle_Oils_Lubricants_Fluids&hash=item3cc621b2cd

[Roger Oakley]

I spit on mine before insertion 

There should be no issue with the o rings with a petroleum grease - even the black ones ! sorry non viton ones ( will I get grassed for that Roger ? ) . Grease will attract grit.

You might do, you might have to ask the "grass" 
But flush your connectors after use with water and lube every now and again, then you should be ok.

[BDCS]

http://www.youtube.com/watch?v=10dmK7O-KSY

[Roland S]

i ended up buying a can of this silicone spray http://www.toolstation.com/shop/Automotive/Lubricants%20&%20Sprays/Silicone%20Spray/d60/sd2795/p21983 £2.61 and worked a treat. my connectors slide in and out nice and easy now.