Originally posted by TGO:
simple explanation - it say not to use anything below 91 in the manual.



Hotter cams, higher compression, basically the motor was not designed for 87 octane.



i suggest you read your manual again. the last page says that regular fuel can be used and the knock sensor will adjust the engine so that it will run. so it CAN be used

~Ryan 1999 T-Red SVT Contour 41k Miles #1701 / 2760 B&M, Custom Y-Pipe, Alpine HU, Pioneer 6x8's & 6x9's