Your search for an economical heavy duty detergent ended once you discover the ease and effectiveness of Oil Be Gone. This detergent is specifically designed to pull oil from linens and massage sheets reducing the buildup of rancidity and stains; added brighteners help make your laundry look even cleaner. Can be used in all temperature settings but hot water opens the fibers more and works better for severe buildup.
Since the difficulty with oil in sheets has to do with buildup that occurs over time it may not be necessary to use Oil Be Gone every time you wash; try it every other load alternating use with your regular detergent and the results should remain the same. Oil Be Gone contains a non-ionic surfactant and does not "suds" as much as most detergents.
Now more concentrated - use only 1/2 to 3/4 cup per load.
Regarding High Efficiency Washers: You may use Oil Be Gone Liquid or Powder - simply use 1/2 the normal amount of detergent - use approximately 1/4 cup to 3/8 cup. Since High Efficiency Washers use less water, the Oil Be Gone is just as effective although used in smaller amounts.
Oil Be Gone is a phosphorous-free detergent biodegradable and environmentally safe. Available in Liquid and Powder form. 28 Pounds - 4 x 7lb Jars.