|   Ok, I have 12.5:1 compression on my engine on #2568, saturday night the 
gas station I normally get gas at was closed and I was almost empty.  So I 
found some 92 octane gas at an all night gas station. I normally put 93 in.  
Well now I get a knocking sound, like a spark knock when I get up to about 
2000 rpm, it doesen't happen while sitting in park, thats why I figured it 
wasent a rod.  but then I put my normall stuff in the tank plus some octane 
boost just a few minutes ago. and it still makes the knocking sound,  has 
anyone heard a thrown rod that doesent knock while in park but does when 
your up to speed a little?  I really don't know what it is, I was hoping a 
spark knock but now I have no idea.
                                                       thanks
                                                       Ryan #2568
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