因此，它需要更多的能量来驱动发动机。这是由于发动机制动系统和扭矩增加更高的含氧化合物在生物柴油（薛，et al.，2011，pp. 1098-1116）。正是由于这些问题，生物柴油的低含量与传统的化石燃料混合在发动机中。在过去几十年中开发的发动机一般与化石燃料不兼容。B5、B7生物柴油是由欧洲国家创造的。B7发动机被接纳为欧洲标准的汽车制造商之间的。开发生物柴油友好型发动机的成本更高。采用美国ASTM D7467坚持协议开辟了发展生物燃料的发动机选择B20（Jääskeläinen，2010）。这已成为流行和正在使用的主流汽车公司。除了这种可行的替代资源正在研究，如发展混合动力电动汽车，太阳能汽车等适应生物燃料的发动机是目前最便宜的替代品，因为它可以被用来与当前车型的车辆。
在发动机动力性能下降，零件的汽车腐蚀，增加滤（该，哈西卜和masjuki，2011，pp. 1314-1324）材料的相容性、燃油喷射装置使发动机性能降低（Jääskeläinen，2010）已被列为使用生物柴油的主要缺点。按照目前的发展，小比例的生物柴油和生物柴油兼容的引擎似乎是可行的（Xue et al，2011，pp. 1098-1116）。然而，应该指出的是，生物柴油发动机技术是比较新的，并承诺将是一个可行的替代传统的车辆系统。在这个问题上更多的研究将纠正这个系统的当前限制。目前的政府法律还需要监督生物燃料的组成，并支持生物燃料的发展。
As a result of this it require more energy to power the engine. There is an increase in engine brake system and torque owing to higher oxygenated compounds in biodiesel(Xue, et al., 2011, pp. 1098-1116). It is because of these issues low content of Biodiesel was mixed with conventional fossil fuel in the engines. The engines that were developed in the prior decades are generally less compatible with the fossil fuels. B5 and B7 biodiesel were created by the European nations. B7 engines were accepted as European standard among the automobile manufacturers. The costs of developing biodiesel friendly engines are more. Adherence of the ASTM D7467 protocols by the United States has opened up the options of developing B20 Biofuel engines (Jääskeläinen, 2010). This has become popular and is being used by the mainstream car companies. Apart from this other viable alternative resources are being studied like the development of hybrid electric cars, solar powered cars etc. Adaptation of the biofuels in engines is the cheapest alternative available now as it can be used with the current models of vehicles.
Limitations and future
Reduction in Engine power performance, automotive corrosion of the parts, increase in filer plugging (Fazal, Haseeb & Masjuki, 2011, pp. 1314-1324) compatibility of the materials, fuel injection equipment causes engine performance to reduce (Jääskeläinen, 2010) has been cited as the major drawbacks of using biodiesel. According to the current development, small percentages of biodiesel and biodiesel compatible engines seems to be feasible (Xue et al., 2011, pp. 1098-1116). However it should be noted that Biodiesel engine technology is relatively new and promises to be a viable alternative for conventional vehicular system. More research in this issue will correct the current limitations of this system. The current government laws also need to oversee the composition of biofuels and support should be given for the development of biofuels.