Anhydrous literally means they left out the water. probably too expensive to include. Andras, I made a misstatement when I said "eats metal" Should have said eats scale. At any rate, if the radiator is beyond a flush with a detergent and water, then I would trust it to a pro. An acid is an acid even though it's "fruity". If you don't mix it right, it can cause problems with all the aluminum in the cooling system. Most of the time, a near neutral PH is what you would like to see.. Maybe, I'll push a lemon or two into my water pump and do it the natural way...
1987 BMW 325
[This message has been edited by jeffsr (edited 04-03-2000).]