Quote:
Originally Posted by redcoats1976
i thought both the L99 and LS3 required premium,isnt that in the owners manual? if i can prove to my buddy that he can run 87 safely he will be pretty happy.
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It's not required but definitely preferred as stated above. If you keep out of the throttle and keep the load on the engine low, you shouldn't have a issue. But like the manual states as well if you heard pinging or knocking then you need to go up in octane to prevent potential engine damage.