TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The biosynthetic oil (99.99 vol.%), is selected from peanut oil, vegetable shortening, cottonseed oil, soy oil, rapeseed oil, canola oil, palm oil, waste vegetable oil, tallow, lard, and yellow grease, brown grease, jatropha oil, copra oil, coconut oil, camelina oil, tallow, lard and yellow grease. The biosynthetic oil comprises at least one recycled vegetable oil; at least one recycled animal oil or virgin oil. The petrochemical fuel is selected from Diesel Number 1, Diesel Number 2, and Farm Diesel. The stabilizer mixture comprises (vol.%): at least one cetane enhancer (2-40), demulsifier (9-60), detergent (1-70), and antigellant (1-5); acetone (2-7); 3-butyl-3-methylnitrate propane (32-55), sorbitan mono-9-octadecenol (1-6), sorbitan tri-9-octadecenol (1-6), 1-hydroxy-3,6-dioxaoctane (0.1-9), long-chain alkyl benzene (8-19), 2-butoxyethanol (4-13), 2-butylbutanol (0.25-5), heavy aromatic naphthas (4-17), 1-methylbenzene (0.3-6), dimethyl benzene (0-13), methyldipropylene glycol (11-24), methyldipropylene propanol (less than 1-26), alkylalkyloxy alkanol (0.1-24), 2-ethylhexl nitrate (18-45), octyl nitrate (2-15), xylene heptane (5-15), 2-ethylhexanol (less than 1-3), antioxidant (1-5) or polydentate metal deactivator (less than 1). The antioxidant include N,N'-di-sec-butyl-p-phenylenediamine, ortho-tert-butylphenol, butylated hydroxytoluene (BHT) and butylated hydroxyanisole (BHA). The polydentate metal deactivator include N,N'-disalicylidene-1,2-cyclohexanediamine and N,N'-disalicylidene-1,2-diaminopropane. The stabilizer mixture comprises components selected from at least one additive configured to maintain cetane levels at or above petroleum fuel requirements for Diesel Number 2 fuel; at least one additive configured to maintain and clean oil solids from injectors and fuel systems; at least one additive configured to maintain lubrication of the internal combustion engines and their parts; at least one additive configured to remove or separate water from the fuel and the fuel composition; at least one additive configured to prevent gelling of the fuel composition; and at least one additive configured to prevent oxidation of the fuel composition (preferably at least one additive configured to prevent the oxidation of the fuel composition). Preferred Composition: The fuel composition further comprises (vol.%): at least one petroleum fuel (0-100); at least one biosynthetic oil (up to 99.9); and stabilizer mixture (0.001-0.5) configured to enable the fuel composition to reach the same or higher lubricity, pour rate, and/or flow rate as Diesel Number 1 fuel or Diesel Number 2 fuel. Preferred Method: The method (M1) further involves: stirring the mixture; cooling the mixture and letting the mixture settle. The first temperature is higher than the second temperature. The method (M2) further involves: storing the product mixture. EXAMPLE - A composition was prepared as follows: stabilizer mixture (0.7 gallons) were added to a total of fuel pre-mixture (7000 gallons (26,500 l)) of 70% waste vegetable oil (WVO) and 30% Diesel Number 2 to give a final stabilizer concentration of 0.01 vol./vol.%. The composition was configured to provide for improved diesel engine performance.