ANALISA PERFORMA FOUR STROKE DIESEL ENGINE MENGGUNAKAN  BAHAN BAKAR MULTI-FEEDSTOCK BIODIESEL DENGAN MINYAK SERAI WANGI SEBAGAI ZAT ADITIF

Authors

Multi-feedstock biodiesel; bioadditive; citronella oil; diesel engine performance;

This study analyzes the performance of a four-stroke diesel engine fueled with multi-feedstock biodiesel (palm oil,

waste cooking oil, and soybean oil) enhanced with citronella oil as a bioadditive. Three fuel blends (B35, B40, B100) were

tested with additive concentrations of 0.1%, 0.5%, and 1% under varying loads (2000 W, 3000 W, 4000 W) and engine

speeds (1000 rpm, 1200 rpm, 1400 rpm). Tests included fuel properties (flash point, viscosity, density) and engine

performance parameters (power, torque, and brake specific fuel consumption/BSFC). Results showed that adding 0.5%

citronella oil to B40 produced the highest power and torque, while the lowest fuel consumption was achieved with B35 at

0.1% additive. Higher additive concentrations did not consistently improve performance and in some cases increased BSFC.

All biodiesel blends met the Indonesian National Standard (SNI) specifications for tested parameters. Overall, multi

feedstock biodiesel with low-concentration citronella oil additive offers an efficient and environmentally friendly alternative

fuel, with optimal effectiveness at low additive levels