The best replacement for oil pastels is chalk pastels.

The best alternatives to oil pastels are rated as following:
★★★★★  chalk pastels
★★★★  soft pastels
★★  crayons
★  pastels
★  oil sticks
  regular pastels
  oil paint

Your alternative for oil pastels is not listed? Suggest!
Speaking about oil pastels, one probably shouldn't forget about baby oil.

Other search terms related to oil pastels and their ratings are:
★★★★★ baby oil
★★ turpentine
★★ encaustic
★ gesso
hairspray
You have in mind a companion for oil pastels and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of oil pastels in all years. Click on graph for more.
oil pastels
chalk pastels
soft pastels