Can I use 87 octane gas in my 1993 Lexus SC300 - manual says use 91 octane?

Can I use 87 octane gas in my 1993 Lexus SC300 - manual says use 91 octane? Topic: Can I use 87 octane gas in my 1993 Lexus SC300 - manual says use 91 octane?
May 18, 2019 / By Aurora

Question: When I use 87 octane, it works fine withou a knock. am I hurting the engine. I am trying to save $$$>

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