Oil in cooling system on 1997 Toyota Camry

Car is running fine, not overheating, oil light not on. Took my car in for a regular routine oil change, was told we will not be able to change your oil, because you have oil in the cooling system. What does this mean, how did this happen and what will this cost to fix?

Asked by for the 1997 Toyota Camry
1 answer
Get a second opinion! Some slight oily residue around the radiator cap sealing surface is common and is actually silicate particals from the antifreeze. Good luck, Greg