well i recently stopped using acetone becuase i've developed some different driving habits and wanted to get a new "baseline" MPG average. well tonight i noticed that my temp guage was right in the middle of the "R". it didn't drop much and it didn't go higher. the problem is i remember it being lower when i was using acetone, just at the beggining of the "O". i vaugly remember someone saying that acetone lowers combustion temps. is this true? is this why i'm running a little hotter now that i'm not using it?