Meine Gott,Joel! Five gallons?? If you're in your teens or early twenties,and don't shoot more than a few hundred rounds a week then you'll probably be OK for 50-60 years :haha:.
On a serious note,don't throw it away.Look up the Dutch Schultz dry lube system and use it IF you want to increase your accuracy significantly.I use it in competition chunk gun shooting as do the vast majority of serious competition target shooters.
The 7 parts water to one part oil is generally where most shooters fall in including me,but it can vary up or down ie 8:1 or 6:1(or more/less) depending on what the individual rifle likes best. I simply mix the oil/water accurately,soak the patch strips for 30-45 minutes and lay them out flat on a big piece of aluminum foil and let the strips dry for about 24 hours.This way the oil is evenly distributed through the cloth which is important.It's also important to keep the patch strips sealed up air tight in something like a half pint Mason Jar because-I think-the oil also will evaporate if left exposed to the air for a period of time.
One little word of caution since I'm in the timber business and don't much care for unprescribed woods fires :shocked2:. On days when the humidity is down in the teens or 20's, it is possible to have a dry-lubed patch catch fire from the powder blast.You can safely prevent this by putting a felt WonderWad down between the powder and the PRB.I've never seen burning patches on the chunkgun line even with 200 or so shooters blazing away,but I have experienced it myself a few times when I didn't put a WonderWad down on the powder.Guess I've never seen it on the chunkgun line because almost all serious chunkgunners also use WonderWads for improved accuracy.
We need to build a memorial to Dutch for coming up with this idea! Haven't talked to him in about ten years...heard his health had failed him.Hope he's doing OK.