NOVELTY - A fuel composition (C1) comprises a hydrogenation product of a monocyclic sesquiterpene; and a fuel additive.    USE - As fuel composition in a vehicle; for powering internal combustion engine such as a diesel engine or a jet engine (claimed).    ADVANTAGE - The composition provides biofuels that can be made using reliable and reproducible methods, and that can be used in internal combustion engines such as diesel engines and jet engines. The hydrogenation products of the monocyclic sesquiterpenes are useful as alternative fuels not only because their carbon length meets the fuel range, but also because their branching and cyclic structures improves their cold weather properties, which is critical with diesel or jet fuels. The sesquiterpenes are typically not toxic to the producing organism, especially E. coli and the relatively easy phase separation of the greasy sesquiterpene from the resulting culture media results in the production of the desired sesquiterpene in high titer. The hydrogenation products of monocyclic sesquiterpenes do not have any oxygen in the molecule and thus, they can be transported using current pipeline infrastructure without any problems. The hydrogenation products of monocyclic sesquiterpenes have branching methyl and cyclic structures that improve the cold weather properties of this alternative biodiesel fuel. The bisabolane biodiesel, which is the hydrogenation product of e.g. bisabolene, zingiberene, and/or curcumene does not have any oxygen in the molecule and thus, it can be transported using current pipeline infrastructure without any problems.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a method of making fuel composition involving adding a fuel additive to a hydrogenation product of a monocyclic sesquiterpene;    (2) a method of making a fuel component involving hydrogenating monocyclic sesquiterpene, and recovering the hydrogenation product to produce the fuel component, where the monocyclic sesquiterpene is a member selected from alpha -zingiberene, beta -sesquiphellandrene, alpha -bisabolene, beta -bisabolene, gamma -bisabolene, curcumene, and/or gossonorol;    (3) a vehicle comprising an internal combustion engine, a fuel tank connected to the internal combustion engine, and a fuel composition in the fuel tank, where the fuel composition is the fuel composition (C1), where the fuel combustion is used to power the internal combustion engine; and    (4) a method of powering an engine involving the step of combusting the fuel composition in the engine.