Him: ''How much brake fluid did you buy when you did that brake work on your truck?''
Me: ''Three quarts.''
Him - much later: ''Hey, I bought three quarts of brake fluid like you said and had one quart left over unused.''
Me: ''So did I.''
What can I say, I like the idea of having a spare bottle.
Pretty sure that's the only fluid my trucks use that I don't have stashed in the garage somewhere.