[mjohn]

Squeaky back wheel...while driving in reverse...
Or does it stop and start squeaking?

Dip Stick heater...I have heard of them but...have not used them...I live in Central Minnesota...and have used tank heaters, frost plug heaters...magnetic heaters that are placed on the oil pan...But, personally if It is cold and I expect the vehicle to have a hard time starting...I take my battery in...which is simple...once you loosen the terminal ends...if you remove the holddown...often the cables can be pushes on and twisted slightly to tighten....and therefore no wrenches needed...

Now, again I live where it is often below zero...and if I need to get to work the next day...a warm, charged battery...is the ticket...Blessings... :o)