so until i get my custom tunes, i guess i should use level 1 & maybe 2. i mean the only thing i got done to my truck thats realy different for performance if that how ya wanna think of it is the cold air intake. otherwise everything is stock. and with the fuel, i ordered the 87 performance tune -i had said once before that im not a fan of switching types of fuels. once 87, always 87 unless an extreme emergency. you know!
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