Can this be used on carpet (specifically in an auto) and vacuumed up?

No, the product should not be vacuumed.

No, unfortunately. The Zep Instant Spill Absorber is for use on hard non-porous surfaces. It is not advisable to remove this product with a vacuum and/or auto machine. For Best results, mix the Instant Spill Absorber (with a medium to stiff bristle broom) into the spill in a circular motion breaking up all the clumps, until the liquid is completely absorbed. If the spill is not completely absorbed, add more Instant Spill Absorber directly onto the residue. Repeat until the liquid is completely absorbed and the surface is clean and dry. After the spill is absorbed, sweep up the Instant Spill Absorber with a broom and dustpan. The Zep Instant Spill Absorber may then be disposed of according to Federal, State and Local regulations for the liquid absorbed. Thank you for your inquiry. We appreciate your business and opportunity to service you. Sincerely, Zep Inc. Retail Technical Support