The best replacement for synthetic oil is regular oil.

The best alternatives to synthetic oil are rated as following:
★★★★★  regular oil
★★★★  conventional oil
★★★★  conventional
★★★★  regular
★★  mineral oil
★  blend
★  high mileage oil
★  synthetic blend
★  standard oil
★  non synthetic
★  non synthetic oil
★  petroleum oil
★  synthetic blend oil
★  motor oil
★  premium oil
  semi synthetic
  dino
  real oil
  regular oil high mileage
  semi
  conventional motor oil
  high mileage
  mineral
  regular oil cost
  full synthetic
  mobil 1 full synthetic oil
  petroleum
  natural oil
  regular motor oil
  normal oil
  blended oil
  conventional oil high mileage

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

Other search terms related to synthetic oil and their ratings are:
★★★★★ regular oil
★★ kevlar clutch
★ zddp
★ regular filter
★ conventional
★ conventional oil
regular motor oil
mineral oil
You have in mind a companion for synthetic oil and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of synthetic oil in all years. Click on graph for more.
synthetic oil
regular oil
conventional oil