As a new owner of a couple of Heng Long tanks with the plastic gearboxes,
I was wondering what, if any, lubrication should be used on these?  [Also frequency (?)]

I was thinking of using white lithium grease for the gears, and a light machine oil or similar for shafts, ect, however I'm not sure about how the plastic gears used in HL tanks would respond to lubricants.

My backup plan in the event of a gearbox failure is to replace with metal gears (which of course need lube) but before I get to that point I'm just looking for good preventative maintenance practices for the equipment I currently have.

Couldn't find anything in the manuals and there is conflicting info online with respect to running plastic gears lubed vs dry, so I am wondering if lubing plastic gears is even recommended. Any feedback on this would be most welcome.

Thanks in advance 

I only have one tank with plastic gears and its my Tamiya Tiger. when i got it it was greased with the tamiya white grease. I've ran it like this for i think 5 years without adding to it but i'm cleaning this tank up a bit and greasing everything since wheels have come unglued. I will be using Udder Butter from COWRC.COM  should be able to get it from a rc hobby show if not my local hobby shop has lots and i can grab some jars or syringe. I use this stuff on all my rc's

White lithium is inert so safe for plastic. It is all I use...

Thanks for the tip Negaduck!

Cheers, Pete

Thanks for the advice, dgsselkirk! I think I am going to go ahead with lubing the gearbox.