Okla. Stat. tit. 15, § 15-301: Lender may require return, when

The lender of a thing for use may at any time require its

return, even though he lent it for a specified time or purpose. But

if, on the faith of such an agreement, the borrower has made such

arrangements that a return of the thing before the period agreed

upon would cause him loss, exceeding the benefit derived by him from

the loan, the lender must indemnify him for such loss, if he compels

such return, the borrower not having in any manner violated his

duty.