oil recyclers get a bit torqued about folks contaminating their used oil collection system with dirty solvents Chip, especially water based, not a good plan
it really is very water soluble and totally non-toxic in dilution, it's used in hundreds of different food and pharmaceutical products, just dilute it a lot and it won't do anything more to your septic system than the dregs of your old pepsi and dr pepper, or dump it on the lawn and watch the fertilizing effect farmers pay big bucks for ... at the same time there is no reason to 'get rid of it' unless/until you're never going to clean any metal again, just strain out large particles, keep it in a closed container and reuse as/when needed
most of the reason for brands changing their formulations is both demands of auto OEM changes and the EPA tightening up on controls of any chemicals, over a certain percent, any acid is considered 'hazardous' and is subject to shipping restrictions as well as workmans comp regulations, not to mention liability issues - when folks misuse things, for some reason it's the makers fault
Bill
