Russian petrol - don't know but possibly just a low octane/poor quality import
TVO - when I started with Shell in the late '60's, we used to stock TVO, it was just a lighter cut/grade of Paraffin used in motor vehicles that normally started on petrol/mogas and then switched to TVO, was Dyed to differentiate for HMC and commonly used in Tractors etc
PZU - Out of Africa (Retired)