Here is a brief dictionary for those just getting started in alternative fuels.. specifically Black Diesel.
Black Diesel - A "diesel fuel" derived from a blend of used petroleums such as motor oil, automatic transmission fluid, hydraulic oils, etc. and a thinning agent. Synthetic or non synthetic.
WMO - Waste Motor Oil - AKA used petroleums
WVO - Waste Veggie Oil - I won't be covering much on this other than it isn't wise to mix WVO and WMO. Use caution when switching between oil sources.
SVO - Straight Veggie Oil - See above.
RUG - Regular Unleaded Gasoline (non ethanol, E10).
W80 - 80% WMO / 20% Thinner (typically gasoline) blend. (Typically a good blend for cold climates / winter months)
W85 - 85% WMO / 15% Thinner blend. (Most common blend)
W90 - 90% WMO / 10% Thinner blend. (Typically a good blend for hot climates / summer months)