<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by GrecianVolvo:<BR><B> Kai,<P>is the effect immediate? And after you run out of that and replace it with "regular", er 93 octane (hehe!), does the performance decrease again, dramatically? Are there any...side effects? <IMG SRC="http://www.swedespeed.com/ubb/smile.gif"><P>Yannis<P></B><HR></BLOCKQUOTE><P><BR>I think the performance will definitely not going to be the same after I switched back to 94. 93 was just that one time thingy... <IMG SRC="http://www.swedespeed.com/ubb/tongue.gif"><P>Yeah...after we drove about few miles...I have to find out how many miles exactly. We took it pretty easy on the country roads on the way back(right after the gas station), didn't really punch it until this backroad before the highway. The country road area was more or less a residential area, so....<P>But still, I'd call that pretty "immediate". It was amazing....my friend was just in my car this past Saturday and he knew how my car drove, we were both very surprised tonight after we tried to open it up a bit on the highway.<P>Now I can understand how APR's chip for the 1.8T was able to make that kinda difference after switching from 93 octane to 100. <IMG SRC="http://www.swedespeed.com/ubb/smile.gif">