**Acknowledgements**

**Figure 13.** Effect of polystyrene(EPS) concentration in FAME on carbon residue.

218 Biofuels - Status and Perspective

**Figure 14.** Brake thermal efficiency vs. engine load of diesel engine generator.

**Figure 15.** Photo of mixture of FAME-dissolved EPS and engine lubricant oil.

We would like to express our appreciation to Mr. Ryuta Onishi, graduate student from the University of Shiga Prefecture, for his assistance with the experiments.
