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Real-time engine oil consumption has been measured at 21 steady-state conditions for a fully broken-in 2-valve Ford 4.6L SI-engine. The sampling location was at the engine stack and the measurement technique was the Southwest Research Institute (SwRI) developed SO2-analyzer for real-time oil consumption measurement, referred to as SwRI RTOC-II. PCV contribution to oil consumption was determined by measuring the oil consumption with and without the inclusion of positive crank case ventilation (PCV) flow, which is a differental approach. This method has not been correlated to real world vehicle usage but is valuable for making A-to-B comparisons. The paper is important since it presents novel data for real-time steady-state PCV-contribution to oil consumption.

The oil consumption has been measured in real-time for steady-state operating conditions for an approximately 2 L SI-engine. These oil consumption measurements have been obtained for the engine stack (total) as well as for the individual engine cylinders with the current generation of Southwest Research Institute (SwRI) developed SO2 analyzers. The 10 steady-state data presented in this paper is only a small fraction of the 234 steady-state data taken as part of this project. This paper is important since few complete data sets have been published in this area of research and since it illustrates the technical superiority of this analyzing tool for engine development purposes.