Lubricating Car Door Lock

[eyepea]

Hi

What type of lubricant can be used for the inside of a car door lock that has plastic parts too?

Normally if it had all metal parts, I guess something like grease, oil or WD-40 would be used.

But someone mentioned that things like oil and grease might not be good for plastic!

Would oil or grease damage the plastic parts (am told those would damage rubber parts) or is it ok to use?

How about WD-40 ?

Would I need to use something like silicon grease instead of the above?

What would you advice please?

Thanks.

[Elvis_Pil]

Singer sewing machine oil and silicon