It really depends on your suspension setup and your wheel widths (therefore your tire widths). If you're stock, you can go to town on offset/spacers. If you're lowered with H&R/Eibach/Vogtland/Megan/etc, then you need to be a bit more careful with final offset. If you're slammed on coilovers, forget it. On a 8.5" wheel with 235s, ET35-36 is as far as you can go. You will rub the outer fender with anything more than that. With 8" wheel and 225 tires, you can go a little lower but you lose a bit of ride comfort.