I usually use Chevron Regular gas and I get 70 MPG to work and back... mostly full throttle using side roads between two cities. I ran a couple extra blocks running errands and ran it out of gas in front of a Valero gas station, Chevron was a couple blocks further up. Same price because I was using a credit card. I usually use 1.3 gallons on Chevron in 3 days of riding but this time I filled it with 1.405 gallons of Valero Regular. On Valero, I had to fill after 2 days, and it took 1 gallon (I couldn't have gone a 3rd day). Valero was definitely causing my scooter to use more gas... wasn't getting more speed, no extra power, and I didn't drive any extra blocks in those two days. I have so far only achieved 70 MPG on Chevron, which get 15% better gas milage than Valero. Anyone else notice a difference in brands? I'm in California so it might be blended differently in other states.