It really varies based on what kind of wax you're starting with.
Recently, I made a batch with 1 tablespoon of petroleum jelly, about 150 grams of target brand pillar candle shavings, and a tablespoon of vegetable oil. I think next time I'm gonna try to make some with 2 tablespoons of petroleum jelly and 200 g of candle shavings, and skip the veggie oil.
You really gotta play with it to get it perfect. the key is small batches till you've found a ratio you like