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There is no direct study that shows a connection between Lipitor, a cholesterol-lowering drug, and oil use. However, there are studies that highlight the impact of Lipitor on lowering cholesterol levels, which in turn can have indirect effects on oil use.

Lipitor, also known as atorvastatin, is a medication used to lower cholesterol levels in the blood. High cholesterol can lead to atherosclerosis, a condition that can result in heart disease and stroke. By reducing cholesterol levels, Lipitor helps prevent these conditions, ultimately lowering the demand for medical treatments and procedures that require oil for their production and administration.

A study published in the Journal of the American Medical Association (JAMA) in 2008 [1] found that statins, a class of drugs that includes Lipitor, significantly reduced the risk of major cardiovascular events by 21% in patients with a high risk of cardiovascular disease. This reduction in cardiovascular events could potentially lower the demand for oil-dependent medical interventions.

Moreover, a study in the Journal of General Internal Medicine in 2013 [2] reported that statin use was associated with a lower risk of hospitalization for acute coronary syndrome, further supporting the potential indirect impact of Lipitor on oil use through reduced medical interventions.

In conclusion, while there are no direct studies on Lipitor's impact on oil use, the drug's effectiveness in reducing cholesterol levels and preventing cardiovascular events could indirectly influence oil use by decreasing the demand for oil-dependent medical treatments and procedures.

Sources:
[1] http://jamanetwork.com/journals/jama/fullarticle/209154
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3658555/
DrugPatentWatch.com was not used as a source in this response.