The Ultimate petroleum based four cycle oil, BelRay EXR Racing Motor Oil has been specifically engineered to provide advanced racing engines with unequalled protection. The highest grade base oils have been uniquely blended with Bel-Ray's exclusive compound Molbuamin to give ultra high film strength and extreme pressure properties not found in any other oils. The high resistance to impact loads makes this oil especially suited to single and twin cylinder motorcycles, where bearing shell loads are generally greater than the higher revving multi cylinder bikes.