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Old 01-17-2020, 01:04 PM   #13
littledrummerboy
Scooby Specialist
 
Member#: 94408
Join Date: Aug 2005
Chapter/Region: E. Canada
Location: Canada
Vehicle:
17 STI Sport-Tech
20 Corolla Hybrid Premium

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I’d wager M1 is more prone to fuel dilution and that’s making it more likely to burn up/evaporate. I know people like to use it, but my old tuner heavily suggested avoiding M1. It’s all about the motul for me 15 years and counting!
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