i made biodiesel,
so wen i submitted it
they results shows that the diesel index is low and also the there is high residue
i used 25oml of methanol
4grms of sodium hydroxide and also
1litre of groundnut oil can you help me

Unused oil requires 5 grams NaOH. Did you wash the fuel after conversion to remove the residual methanol and soap? How hot was the oil when you reacted? How long did you mix it?