https://www.titanallterrain.com/titan-sidekick-15-gal-portable-liquid-tank-5040015[/QUOTE]
I've had all the Titan tanks for Rams. The side kick don't mount well for Rams. The bracket provided are universal type and satisfaction in this respect is low. The cap and hole used for grounding are not sufficient for Gas though the material is compatible and the strength of the tank is are more than adequate. They are black, will expand, cap will bleed fumes and liquid (gas) when full. 15 gallons for $500 is not bad for XL tank but these are universal and not far from gas cans. Gas cans have better mounting options and greater options for filling and transporting. American company in my home state Idaho is a plus. Tank construction is very stout. Tank appearance is okay. Appearance is faded with little sun exposure. Bowed sides and, if utilizing self tapping screws and mounting hardware, placement of tank is sub optimal. Again, tank is rugged and is a plus for needed rigging of mounting. There is a through hole for grounding via threaded rod and it appears to handle the pressure fine and would be adequate for gas IMO but easy modification could plug.
The tank would also be good for closing in loop with main tank if your committed. Diesel is not pressurized system for EPA and I believe relieves the manufactures of liability and compliance issues that would follow Gas VOC EPA DOT issues.
I am currently looking for alternative DIY for added 20 gallons and ran across this post and got sucked in. I own two sidekicks and mounted in 3 different trucks. I like the sidekicks but thinking critically of value and function, I think I can do better for $200 total plus my hobby time.
P.S. Sidekick tanks for sale $300 ea. pick up only.