The current application of fluids in grinding processes is discussed, the issues related to the use of both mineral oil and water based fluids and the desire to move towards minimum quantity lubrication (MQL) or even dry grinding. The impact of fluid application strategy on workpiece quality is considered. In particular the importance of reliable thermal modelling and knowledge of the thermal partitioning of heat is essential if robust fluid application strategies are to be developed. Examples are given showing how an understanding of the thermal characteristics of the process can be used to develop different and successful fluid application strategies for various grinding regimes from creep feed through to high efficiency deep grinding (HEDG). The possibility of using solid lubricants is also discussed for particular grinding regimes.