This paper presents the result of experimenting emulsified tri-fuel in term of
stability, physico-chemical properties and corrosion effect on three common metals. The
results were interpreted in terms of the impact of five minutes emulsification approach. Tri-fuel
emulsions were varied in proportion ratio consist of biodiesel; 0%, 5%, 10%, and ethanol; 5%,
10%, 15%. Fuel characterization includes density, calorific value, flash point, and kinematic
viscosity. Flash point of tri-fuel emulsion came with range catalog. Calorific value of tri-fuel
emulsion appeared in declining pattern as more ethanol and biodiesel were added. Biodiesel
promoted flow resistance while ethanol with opposite effect. 15% ethanol content in tri-fuel
emulsion separated faster than 10% ethanol content but ethanol content with 5% yield no phase
separation at all. Close cap under static immersion with various ratio of tri-fuel emulsions for
over a month, corrosiveness attack was detected via weight loss technique on aluminum,
stainless steel and mild steel.