ATDC	after top dead center
B0	100% diesel fuel
B100	100% palm kernel oil biodiesel
B20	20% palm kernel oil biodiesel + 80% diesel fuel
B20 + BHT	B20 + butylated hydroxyltoluene
B20 + DEE	B20 + diethyl ether
B30	30% palm kernel oil biodiesel + 70% Diesel
B40	40% palm kernel oil biodiesel + 60% Diesel
BHT	butylated hydroxyltoluene
BP	brake power
BSFC	brake specific fuel consumption
BTDC	before top dead center
BTE	brake thermal efficiency
CI	Compression ignition
CN	cetane number
CO	carbon monoxide
CO2	carbon dioxide
DC	diffusion combustion
DEE	diethyl ether
FFA	free fatty acid
HHR	heat release rate
KOH	potassium hydroxide
NaOH	sodium hydroxide
NOx	nitrogen oxides
PC	premixed combustion
PKO	palm kernel oil
PO	palm oil
SOC	start of combustion
UHC	unburned hydrocarbon
WCO	waste cooking oil