This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Impact of Aniline Octane Booster on Lubricating Oil
Technical Paper
2016-01-2273
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
This paper describes the observed impact of aniline octane booster and more specifically N-Methyl Aniline (NMA) on lubricating oil, following field issues encountered in vehicles in certain areas of the world where aniline based octane booster was assumed to be used. The observed field issue was heavy sludge formation, leading to engine malfunctions.
The impact of NMA on lubricating oil could first be replicated using a modified version of the CEC L-109 oxidation bench test, with oil diluted with fuel and NMA at start of test. Significant kinematic viscosity (KV100) increase at the end of test was evidenced, especially as NMA content was increased in the oil. Total base number (TBN) evaluated at end of test also showed values above fresh oil (at or above 4.5 wt% NMA) that was consistent with observations from the field.
The assessment of NMA impact was then scaled up using ACEA black sludge engine test. Tests run with 3.5 wt% NMA added to black sludge reference fuel led to poorer sludge rating compared with standard black sludge test. Increased sludge formation in presence of aniline based octane booster evidenced on black sludge test was also consistent with observations from the field.
Modified CEC L-109 oxidation bench test correlated to black sludge test in terms of sludge rating trend. However, no correlation could be found for kinematic viscosity increase and further work is in progress to understand the root cause, including impact of engine oil formulation.
Recommended Content
Authors
Citation
Marie, H., Rigol, S., Deeg, H., and Philipp, H., "Impact of Aniline Octane Booster on Lubricating Oil," SAE Technical Paper 2016-01-2273, 2016, https://doi.org/10.4271/2016-01-2273.Also In
References
- Hart Energy : Global An Overview of Gasoline Quality, Vehicles Emissions and Technology Issues Special Report April 3 2014
- Hoshimiya H. Chem. Eng. Lt. Comdr. Research on Antidetonants of the Aniline Series US Navy December 1945
- Kasputin V.M. Petroleum and alternative fuels with additive and supplements KoloS 2008
- CEC-L-109-14 (S) Oxidation Test For Engine Oils Operating In The Presence Of Biodiesel Fuel 22 December 2014
- ASTM D445 REV A Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity 2015 12 01
- ASTM D2896 Standard Test Method for Base Number of Petroleum Products by Potentiometric Perchloric Acid Titration 2015 12 01
- GFC Tr-022-A-90 Determination of the insoluble content of lubricating oils after oxidation by artificial ageing (transmission lubricants) Groupement Francais de Coordination
- ACEA Service Fill Oils for Gasoline Engines, Light Duty Diesel Engines, Engine with Aftertreatment Devices and Heavy Duty Diesel Engines 2012
- ASTM Deposit Rating Manual 20 (Formerly CRC Manual 20) 2009