Google PageSpeeds Insights says:

Should Fix: Optimize images Properly formatting and compressing images can save many bytes of data. Optimize the following images to reduce their size by 245.2KiB (17% reduction).

It wants me to optimize about 25 images which are the tiles that make up a Google Map. Is there anyway to fix this issue?

Here is an example of a tile:

<img src="https://mts1.googleapis.com/vt?pb=!1m4!1m3!1i13!2i2475!3i3029!2m3!1e0!2sm!3i293208756!3m9!2sen-US!3sUS!5e18!12m1!1e47!12m3!1e37!2m1!1ssmartmaps!4e0!5m1!5f2" draggable="false" style="width: 256px; height: 256px; -webkit-user-select: none; border: 0px; padding: 0px; margin: 0px;">

I've done a lot of googling around, but haven't been able to find anything. Does anyone know of something in the Google Maps API that may be helpful? The tiles are PNGs, so would converting them to JPGs help? (And how would I do that?)