94 Camry Leakage?

Are any fluids low?

Take a pice of white cardboard and place it under the motor at night and check for the color in the morning. My guess is oil, but not sure about the white/gray.

A small oil leak can appear to be worse than it appears. A tablespoon of oil can turn into a 1’ diameter stain. Where small leaks become a concern is when it is getting onto hot components such as the exhaust manifold and presents a potential fire problem; also, if it is getting onto an electrical component such as a starter motor. Finally, if it is saturating a rubber component such as a hose, belt or mount creating slippage or deterioration.

Oil change places seem to hire novices that are more interested in selling an extra to supplement their income instead of bringing important matters to your attention. Certainly not all of them, but more often than not. I recommend you find an independent repair shop that does not pay the service writer or techs on a commission basis. Commission pay = bad decisions in my book. An independent shop is more apt to point out important concerns if there are any. Since they know mechanical problems from repairing them, they can often foresee upcoming problems.