Wheel size question 18x8 40 offset

[f85gtron]

Any experiences in this department? I found some 18" wheels that I like and am wondering if they'd fit without surprises. I've referenced the chart on pff.  It shows no issues, but I'm wondering about hidden issues,.like rubbing in full-lock turning, catching ruts, general feel changes and expectations.
Offset is 40, so it'd be a little in more from the hub centerline than normal. Would 2mm make a difference?

Edit: currently stock hi-tech 6x14" 35mm. So it would be a 5mm difference from centerline.

[TopNotch]

The wheels should fit just fine. If the car is an 88, they will be a bit wide in front, but still OK.

[Fierofool]

Check for clearance at the rear strut spring boss.  If they clear by 1/8 inch, you shoulg be good under all driving conditions because that clearanse doesn't change.