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Originally Posted by pinoix5
im a newbie when it comes to X5 coz im into jdm cars! but im confused should i put 93 octane but the salesman told me i can put middle class fuel which is 89 octane?pls help? by the way our x5 is 2002 3.0i thanks! 
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The minimum the X5 is designed to run on is 91 octane.