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Impact of Aniline Octane Booster on Lubricating Oil

机译：苯胺辛烷增压器对润滑油的影响

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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.
机译：本文描述了苯胺辛烷助力器上的润滑油，在以下的车辆遇到的在世界上的某些区域，其中假定基于苯胺辛烷助力器被使用现场问题所观察到的影响，并且更具体N-甲基苯胺（NMA）。该观测场的问题是沉重的油泥的形成，从而导致发动机故障。 NMA对润滑油的影响可能首先使用CEC L-109氧化台架试验的修改版本进行复制，石油燃料和NMA稀释在试验开始。在试验结束时显著运动粘度（KV100）增加被证明，特别是作为NMA含量在油增加。在测试结束评价总碱值（TBN）也显示值高于新鲜的油（在或4.5重量％以上NMA），其是与从现场观察结果一致。然后NMA影响评估是扩大使用ACEA黑色油泥发动机试验。试验用3.5％（重量）NMA加入导致较差的淤渣率与标准黑色油泥检验比较黑色油泥基准燃料运行。在证实在黑色淤渣试验测苯胺基于辛烷助力器的存在下增加淤渣形成也与从现场观察结果一致。改性CEC L-109氧化台架试验相关黑色​​油泥试验的淤渣率趋势方面。但是，没有相关性可以发现运动粘度增加，进一步的工作正在进行中，了解根本原因，包括发动机油配方的影响。

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