C12 and C14 Racing Fuel has set the standard for performance in AMA competition for over 20 years. Recent rule changes in AMA have mandated the use of fuels with specific gravity greater than .715. The rule now approves the use of oxygenated fuels to the limit of 2.8% by weight.

   These fuels are designed for AMA competition and optimized for performance, although they will be used in other forms of racing. They were developed during the later part of 1997 and were used by factory teams in 1997, 1998 and 1999. This is a series of fuels that are progressive in their characteristics. There are enough differences that one of these fuels will be optimized for your engine design. These fuels have different burning speeds, vaporization, octane and energy value. MR-2 though MR-8 are sequential in octane numbers.

   We have designed these different fuels so you can test fuels in a logical progression. MR2 was designed for 2 stroke motocross applications, MR4 for 4 stoke motocross and 600 and 750 supersport, MR6 for high compression superbike and MR8 for 125 and 250 GP bikes. That is not a "set in stone" rule, only a starting point. All of these fuels will readily mix with 2 stroke oil, and contain an anti-foam agent in parts per million, as foaming is more of a problem in motorcycle engines than other applications. These fuels are not designed for forced induction (blowers and turbos) or nitrous oxide engines. Those applications would require different fuels.

   At VP Racing Fuels, we design, develop and manufacture fuels for racing. If you require fuels not listed here, we can provide or develop a product to accommodate your specific needs.