In situ combustion remains the most tantalizing enhanced oil recovery method. It bas been tested extensively-in over 150 field tests-in both heavy and light oil reservoirs. What we have learned from this experience is that in situ combustion works under most conditions, but the nature of the problems is such that it is seldom profitable. Also, looking at many previous in situ combustion tests, steam injection, and even waterflooding, would have been a better choice. Yet in situ combustion bas unique features not found in any other EOR method. These must be weighed against its shortcomings to evaluate a potential application. This paper discusses the redeeming features of in situ combustion, in particular the reservoir conditions under which in situ combustion may be superior to other EaR methods are outlined. All variations of in situ combustion-forward, reverse, wet, dry-as well as combinations with other EOR methods are considered. The conclusions is that in situ combustion still bas a place, and its future application would depend on research on certain crucial aspects of the process.