There is a system that I have been studying for several years that can save you significantly in the gas cost dept. The technology is proven, it's called water4gas. There is a kit available to suit the size of your vehicle. The investment costs can be recouped by gas savings and performance boosts in your vehicle in months, depending on the amount of driving you do.
Anyone who does a serious amount of driving will benefit by this technology. Please check it out. This is my affiliate link; I wouldn't be promoting this if I didn't believe in it 110%:
I am a grandpa, semi-retired. A long time student and teacher of the spiritual life,a minister, artist, musician, writer, dancer, walker, and organic food lover. Natural healing is one of my passions. I listen to a lot of Spiritual music,jazz, folk, classical, world and new age music but like all kinds. I love PBS and exploring Cyberspace. My ex-wife was born on the planet Venus; her name is Omnec Onec.