I use plain paraffin wax as stated before.
I have 11k plus km on one chain running at 0.3 wear.
I started using two chains a while ago and this has 3k km on it and still running at 0.2 wear.
Cassette looks great, about 15k. The chainrings have 25k and look ok great
I am now saying i have saved two chains and one cassette cost. Happy!
Clean chains, bike and hands.
Total wax and additives cost to date $15.