Motor oil, grease, hydraulic fluid, diesel soot, and shop grime are not normal stains.
They are petroleum-based. They cling to fabric. They smear when wet. They transfer to other clothes. And once dryer heat hits them, they can become almost permanent.
Why grease stains survive normal laundry
Regular detergent is built for everyday laundry. It can handle sweat, food spills, light dirt, and normal body oils. Trade work brings heavier contamination: motor oil, bearing grease, hydraulic fluid, diesel fuel, chain oil, brake dust, road grime, roofing tar, concrete dust, and machine-shop residue.
Step-by-step: how to remove grease from work clothes
1. Knock off dry grime first
Before adding water, brush off loose dirt, brake dust, dried mud, concrete dust, or metal shavings.
2. Pre-treat every grease spot
Apply a heavy-duty workwear detergent concentrate or degreasing pre-treatment directly to the stain. Work it into the fabric and let it sit for 10-15 minutes.
3. Wash work clothes separately
Petroleum residue can transfer across the load. Keep greasy workwear away from household laundry.
4. Use warm or hot water when safe
Warm or hot water helps loosen petroleum soils. Always follow the garment care label, especially for FR clothing, high-vis gear, synthetic blends, and duck canvas.
5. Use a grease-cutting detergent
Look for clean-rinsing formulas without optical brighteners, fabric softener, or chlorine bleach.
6. Air dry and inspect
Do not throw stained workwear into a hot dryer right away. Air dry first. Inspect the garment. If grease remains, pre-treat and wash again.
How to remove old grease stains
- Apply detergent concentrate or degreasing pre-treatment directly to the stain.
- Let it sit 15 minutes.
- Wash warm if the fabric allows.
- Air dry.
- Repeat two or three times if needed.
What not to do
- Do not use hot dryer heat too soon.
- Do not use fabric softener.
- Do not mix greasy workwear with household laundry.
- Do not rely on fragrance to solve oil contamination.