Mcdonalds work shirt by timeless elements M VGUC

I have two of these SS tee shirts. Both are Medium and they both have some grease stains on them. An almost sure way to remove these is with white king, borax water softener and 3 tablespoons of free and clear Tide detergent, unless you have an Eco laundry system, then you don't need the detergent, just the softener. Next time I do my laundry (in buckets) I will throw these in and see what happens. Ozone (Eco Laundry System) cleans laundry better than any detergent. I've been using it for years.