![]() Royal Purple uses a different chemistry than most oils. Some additive chemicals can cause adverse conditions when used for long periods. One of their big selling points is extended drain intervals. The chemistry they use is something AMSOIL, Inc. Now let's see what is behind Royal Purple formulation & how the technology compares with AMSOIL, which has half the wear scar as Royal Purple.Īs you may know, Royal Purple is well known in racing circles. For details visit 2016 5W30 Oil Comparison TEOST 33c Results page In 2016 AMSOIL again subjected Royal Purple 5W30, Mobil1 Extended Performance 5W30 and AMSOIL signature series 5W30 to ASTM TEOST 33c test and found AMSOIL to be 3.6X better than RP and 4X better than Mobil1 EP. For full report refer, 2013 synthetic oil comparison test results page In 2013 AMSOIL compared Royal Purple along with 9 other brands. When the new formulation was put to the test, the results indicate 3 times better wear protection compared to Royal Purple 20W50 when AMSOIL RD50 is used.Ģ008 ASTM D-4172 test results (see below) reveals that Royal Purple 5W20, 5W30 & 20W50 causes nearly 3 times the wear scar when compared to AMSOIL Dominator® Synthetic Racing Oils RD20 5W-20, RD30 10W-30 & RD50 In 2008 AMSOIL replaced the Series 2000 20W50 Racing Oil with AMSOIL Dominator® Synthetic 15W-50 Racing Oil (RD50). In fact Castrol Syntec & Mobil1 Extended Performance 15W50 marginally outperformed Royal Purple. When compared with Royal Purple 20W50 to AMSOIL Series 2000 20W50 Racing Oil (TRO). Our 2005 test results show nearly 2 times wear scar The smaller the wear scar, the better the protection. The size of the scar left as a result of the test determines the amount of wear protection the lubricant provides. To test lubricant performance, we use ASTM D-4172, the industry standard testing methodology to determine wear protection of a lubricant.įour-Ball Wear Test (ASTM D-4172) evaluates the protection provided by engine oil under conditions of pressure and sliding motion. Lets see how Royal Purple's moly based lubricant technology has performed over the years. AMSOIL vs Royal Purple Motor Oil Protection Against Wear - The Most Critical Component!
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