Everyone's trying to stretch a buck these days. That's part of the reason Optimum stuff is so popular. A quart of OID makes a GALLON when mixed with DI water. Likewise that a Gallon of it makes 4 gallons. Almost everything they make dilutes into a more cost effective solution than other companies are providing.
ONR can make clay lube, QD and of course the rinseless wash by using varying amounts of the same product to DI water. Less containers to keep around, if that's your thing.
2oz for 4 gallons of water was more than enough suds/lubcricity/cleaning power for DG #901/902/903.. Next time I'll try it without the ONR though.

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