The paper deals with the oscillatory behavior of second order nonlinear neutral delay differential equations of the form
where , is a constant, and moreover , , and . The purpose of the paper is to improve oscillation results obtained for equation (1) by W. Shi and P. Wang [Appl. Math. Comput. 146, No. 1, 211–226 (2003; Zbl 1037.34059)] using a generalized Riccati transformation and developing ideas exploited by Yu. V. Rogovchenko and F. Tuncay [Nonlinear Anal., Theory Methods Appl. 69, No. 1 (A), 208–221 (2008; Zbl 1147.34026)]. Two examples are provided to illustrate the relevance of obtained results.