Cheaper paint like Omni is junk....... Those numbers are not IM numbers..... Very simply their paint coding system, not to be confused with the old Intermix set up. Sometimes you can cross reference the numbers, but this is more common with numbers for modern cars. In some cases PPG numbers won't convert to DuPont numbers. etc.... most of the IM numbers you find now are worthless as the tint bases and mixing ratios have changed.