Remaining methanol content and freezing point (non-demethed bio for boiler)

[julianf]

Im about to brew a batch just for the boiler here (none will go in the car).  Its made almost exclusivly from beef tallow, which is too hard to even trowel easily. 

I dont see any real point in demething it, apart from possibly killing my boiler oil pump seals  - could anyone shed any light on how well methanol raises the melting point?

I suspect its not an area most are familiar with, what with soaps issues in cars, and the HMRC issues for road use.

Thanks, Julian

[kamaangir]

Funny you should mention this, I have been doing some rudimentry tests on adding meth as a winteriser to bio. It has so far supressed the forming of hmpe's compared to the control sample. Next test will be a bit bigger and use bio made from svo as well as liquid and solid wvo. I will keep a tighter check on the temps too.

I will do a post with them when its done and have something conclusive.