The best replacement for fully is partially hydrogenated.

The best alternatives to fully are rated as following:
★★★★★  partially hydrogenated
★★★  semi synthetic oil
★★  partially hydrogenated oil
★★  wholly
★  semi synthetic
★  part synthetic oil
★  partially
  fully understand

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Speaking about fully, one probably shouldn't forget about bully.

Other search terms related to fully and their ratings are:
★★★★★ bully
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fully
partially hydrogenated
semi synthetic oil