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Edycol, I'm curious to your thoughts on ASTM D5481 vs ASTM D4741 for HTHS testing methodologies. I ask as I notice Liqui Moly uses this on their 5-40 Leichtlauf vs other manufacturers seem to favor the D4741 method. From what I can tell, D5481 appears to be more stringent.
Last edited by Sophisticated Redneck; 01-10-2022 at 10:49 AM..
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