Used oil ester is always darker than new oil ester. But perhaps this
explains why my acid-base batch gave poor miles per gallon. I used
loads of methanol, but it was a dark colour. Maybe I did not use
enough base catalyst.
Or maybe I over-did the acid stage. Does anybody have any timings for
I'd like to be wrong on this, but as far as I can find out, DIN 51606
testing is not commercially available in UK. I'm sure a university
could sort something out. If you have time and can handle the
beurocracy.
Otherwise I think, test the factors which confirm the fuel's quality,
water,
You could test for specific gravity (use a hydrometer)
, viscosity, gel points (temp at which it starts to
solidify), or flash points.
All of these need to be (about) right for an effective
fuel, and are easy to test for. I got a catalogue for
a schools chemistry supplier - they have all sorts
You could test for specific gravity (use a hydrometer)
, viscosity, gel points (temp at which it starts to
solidify), or flash points.
All of these need to be (about) right for an effective
fuel, and are easy to test for. I got a catalogue for
a schools chemistry supplier - they have all sorts
