I've been wondering for a while why people insist on using Naptha and Hexane as their NPS, where there are plenty of nonpolar oils around in most people's kitchen that, (at least in my head) should behaves in a reasonably similar way. Even if they don't evap clean, they are food safe, and you should always be able to salt the DMT out of them again.

Is there a reason that, say, canola or rapeseed oil wouldn't work?

Blessings
~ND

There are a few reports in the Eco friendly extraction teks forum. That's where you want to be looking.

As stated, check the eco-friendly tek forum. Naphtha and the like are so popular because they allow freeze precipitation or evaporation. With a cooking oil you don't really have either option, you have to salt it out. There is no reason to be scared of using a clean hydrocarbon based solvent, and even after freeze precipitation you can simply redissolve in ethanol and let evaporate to get any residual NPS out of the crystalline structure.

check out some of the posts here.

Saponification of oils is the biggest issue. Fatty oil + base = soap .

heard lots say that, yet never seen it happen.

Would you mind giving a short run through of your salting process Jamie? Ideally with volumes, never seems to go as the process is described resulting in a third layer and stubborn emulsions.
How long does it usually take to convert to a salt and migrate to the water?