Start with fuel tank upgrades since they're crucial for longer rides and you'll want all 7 of them. Finding camps is your main priority, keep o'leary mountain in mind since it's always got fuel and repairs waiting. Pretty much any downhill stretch lets you coast without burning fuel, and remember you can always push the bike if you're empty though it's painfully slow. Collecting scrap while you explore is smart, keeps the bike running smooth when you need it most. Maybe interesting but the fuel burns at a fixed rate no matter how you drive, so focus on finding those refuel spots and mapping routes between camps instead of trying fancy eco-driving tricks. Good to know that holding square at mechanics gets you topped up quick, just try not to let the tank run below quarter full since random hordes can make detours really messy.