The best replacement for regular oil is synthetic oil.

The best alternatives to regular oil are rated as following:
★★★★★  synthetic oil
★★★★  synthetic
★★★  synthetic blend
★★  high mileage oil
★  motorcycle oil
★  high mileage
★  full synthetic
★  synthetic oil motorcycle
★  diesel oil
★  semi synthetic oil
  synthetic blend oil
  marine oil

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

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



Google Trends

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