This paper presents a study of the development of first order flash temperature models for basestock mineral oil containing palm olein and aminephosphate additives. The flash temperature parameters are developed in terms of load, rotational speed and operating time using response surface method and design experiment. Flash temperature contours have been generated from these model equations and are shown in different plots. This paper shows palm olein indeed itself is a good anti wear lubricant compared to mineral oil base stock (SN500) but the use of antiwear additives shows an increase in better lubrication as smaller wear scars are found out from using palm olein in the test runs using a fourball machine.

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