Use of the Rancimat ® Method for the Control of the Oils Motor Vehicles Quality

Paper #:
  • 2010-36-0548

Published:
  • 2010-10-17
Citation:
Pepe, I., Silva Brasil, C., Brito Pereira, P., Ponte, V. et al., "Use of the Rancimat® Method for the Control of the Oils Motor Vehicles Quality," SAE Technical Paper 2010-36-0548, 2010, https://doi.org/10.4271/2010-36-0548.
Pages:
5
Abstract:
Synthetic, semi-synthetic and mineral vehicular oils used in gasoline/alcohol/VNG engine were evaluated by Rancimat® method. The experiment consisted in submitting 3 g of different virgin (off the self) motor oils samples to a temperature of 110°C and 10 L/h air flow. The oils are chosen and classified as multiviscous brands and recognized by their trademarks: Lubrax (Petrobras) and Mobil (Esso). The conductivity curves show the oxidative evolution as a function of time for the different oils. The synthetic, as well as, the mineral motor oil shows almost the same profile, where the conductivity curve differential is about 0.55 μS/cm₂h. However, once one start measuring up to 10.8 days, the mineral oil presents an oxidation meaning values 1.4 μS/cm₂ higher than any synthetic oil.
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