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Sunoco Race Fuels is a refiner and distributor of racing fuels. Originally featuring two high-octane options (Sunoco 260 and 280), Sunoco Race Fuels now produces 18 different high-performance fuel blends, which are used for all types of professional motorsports. All Sunoco Race Fuels products are refined at Sunoco LP's Marcus Hook facility. [89]
This race was the first run in Nextel Cup series history with unleaded gasoline, as all three major series began running Sunoco 260 GT Plus, a 104-octane (R+M/2) unleaded racing fuel, starting with this race. Jeff Gordon won his first pole of the season.
The Stage 3 ECU allows for the use of a 50‑shot of nitrous, 100 octane fuel and an adjustable redline from 6,750 to 8,000 rpm. Stage 3 produces 248 hp (185 kW) using 93 octane fuel, up 260 hp (194 kW) using 100 octane fuel, and much higher power with nitrous.
lower octane gas can be sold if labeled as "sub-standard" or "sub-regular" [11] South Dakota: 85/87 87/89 91 85 octane must be sold with a warning label displayed at the pump. [12] 85 and 86 octane can be sold as regular fuel only in the counties of Butte, Custer, Fall River, Harding, Lawrence, Meade, Oglala Lakota, Pennington, and Perkins.
Petrol additives may increase petrol's octane rating, thus allowing the use of higher compression ratios for greater efficiency and power, or act as corrosion inhibitors or lubricants. Other additives include metal deactivators, oxygenates and antioxidants. Some additives are harmful and are regulated or banned in some countries.
In the 2008 season, E85 was allowed in the GT class and teams began switching to it. [115] In 2011, the three national NASCAR stock car series mandated a switch from gasoline to E15, a blend of Sunoco GTX unleaded racing fuel and 15% ethanol. [116] Australia's V8 Supercar championship uses Shell E85 for its racing fuel.