Clean Fuel & Lubricant Solutions Patch Tests and ISO Codes

Donaldson Company Inc. www.mycleandiesel.com

Pictures of Patch Test Results and their Corresponding ISO Counts

Greater than 22/21/18

More than 4,000,000

Particles per 100ml

ISO CODE 22/21/18

2,000,000 4,000,000

Particles per 100ml

ISO CODE 20/19/16

500,000 1,000,000

Particles per 100ml

Clean Fuel & Lubricant Solutions Patch Tests and ISO Codes

Donaldson Company Inc. www.mycleandiesel.com

ISO CODE 18/16/13

130,000 250,000

Particles per 100ml

ISO CODE 16/14/11

32,000 64,000

Particles per 100ml

ISO CODE 14/13/11

8,000 16,000

Particles per 100ml