Okay I was going to let this go because it looks like just a matter of opinion. However, when people try to say that it can't be used or that is does not say in the manual that you CAN use regular, then I have to proove them wrong.
So here it is, scanned from page 13 of the SVT Contour Owners Guide Supplement which applies to all years as the 99's and 00's came with the same ones printed in 1998.
Argument Closed.
