Questions about gauge of wiring

For engines I use a 22 solid.
For moving on trucks or between cars you need stranded.
20 tends to be thick so I use 22 stranded for that.
I will use 20 for setting up dual motors.
If the engine is huge go with 20.
Overall it does not make much difference.
Stranded comes in a three pack from Radio Shack.
Home depot has the 9 lives, liftime supply.

You may need to reduce the size.
In phtobucket I save pictures on medium.
On the PC I use paint and resize to 12 from 100. use manage attachments to upload to a post.