I have searched now for OEM lightweight wheels for many years and found some jewels. I try to keep this list updated up to time to time so first post should have valid list of light wheels.
VW Lupo 3l 4½ J x 14, ET38 = 4.4-4.5 kg = 9,7-9,92 lbs
Citroen C5 "steel" 6.5x15" 4x108 ET 18 Weigth 4.7 Kg = 10.36 lbs
VW Lupo 5 J x 14, ET38 = 4.8 kg= 10,582 lbs
MB SLK type R170 5x112 ET37 7 J x 15 = 5,2 kg = 11,46 lbs
Renault Laguna "steel" 5x108 ET50 = 5.5 kg = 12.12 lbs
BMW E39 "steel" 5x120 7JX15 ET:20 = 5.7 kg = 12.56 lbs
Audi A6 C5 also A4 B5 5x112 ET45 6 J x 15 = 5.8 kg = 12,79 lbs
Audi A3 5x112 ET38 6 J x 15 = 6.0kg =13,22 lbs
BMW 3 series type 3B, 3/B ET47 7 J x 15 = 6 kg = 13,22 lbs
Renault 5x108 "Steel" 7x16 ET 50 =6.1 kg = 13.45 lbs
Audi A8 D2 5x112 ET42 7 J x 16 =6,1 kg = 13.45 lbs
MB CLK type 208 5x112 ET37 7 J x 16 = 6,1 kg = 13,45 lbs
MB C-Class type 204 5x112 ET39 6 J x 16 = 6.8 kg = 15.00 lbs
MB E-Class type 211 5x112 ET33 7 J x 16 =6.8 kg = 15.00 lbs
Audi A4 B6 ET39 7 J x 15 = 6,82 kg = 15,03 lbs
MB SLK type R171 5x112 ET34 7 J x 16 = 6,9 kg = 15,21 lbs
Volvo Acrux 5x108 6J x 15 ET46 7.0kg/15.5 lb
MB C-Class type 204 5x112 ET43 7 J x 16 = 7.3 kg =16,09 lbs
MB E-Class type 211 5x112 ET42 7½ J x 16, = 7.4 kg = 16,31 lbs
MB E-Class type 212 5x112 ET38 7 J x 16 = 7,4 kg = 16,31 lbs
Audi A6 5x112 C5 ET45 7 J x 16 =7,5 kg = 16,53 lbs
Volvo Cordelia 5x108 6.5Jx16 ET52.5 7.5kg/16.5lbs
"steel" means its aluminium wheel that is pressed from sheets and looks like normal steel wheel. Conserning those aluminium steel wheel when buying from the internet safest way to be sure its aluminium is to try with magnet. Usually the wheels center piece is about >5mm thick
More wheels and pictures:
OTTO FUCHS KG: Car
I will try to write those fuchs wheel list to here but today I dont have the time for it. In short Fuchs wheels are one the best wheels you can buy if you are searhcing for light and reliable wheels.
More citroen and renault stock "steel" wheel will follow later when I have weighted the rims...
Reason why I would like to make also this kind of list is that these are usually very cheap to buy as there are many of them produced. You could get the Citroen C5 wheel for 30 € a set and thats a bargain.
If you have deep pockets or want more looks you can check this list:
WheelWeights.net - Database of Wheel Weights
I will try to make similar exel on these OEM wheels...