In addition, petroleum wax production as a percentage of amount of crude oil processed has declined significantly as a number of lube producers now convert the wax in lube fractions to lubricants by isomerization.

• 另外，石油蜡生产量是所加工的原油的百分比，已经降低了很多，因为现在很多润滑生产商都在把润滑部分的蜡异构成润滑剂。