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Forum: Engine/Performance 05-18-2011, 01:50 PM
Replies: 18
Views: 32,093
Posted By CXTKRS1
Your GSR was also an older engine. 87 octane is...

Your GSR was also an older engine. 87 octane is all that is needed in the xD, anything else you are not seeing any gains and just wasting money.
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