Should be fine if you are planning to add the LS stuff to suit your taste. But why not just get it pre-mixed? Do you feel like their regular 75w140 has too much LS additive?
I would also recommend calling Red Line tech support directly and talking to them, they're smart people who could help understand your needs and recommend a product.
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Now: 2017 Corvette Grand Sport, 2021 AMG C63 S sedan
Past: 2011.5 M3 sedan ZCP
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