Should radiators be filled with oil?

Answer by  Matt89 (177)

Radiators SHOULD NEVER be filled with oil. Thats one way to destroy its functionality the whole point of the Radiator is to keep the engine from overheating. If you put oil in it without a doubt your car would overheat because oil absorbs heat which would create more heat. ONLY use coolant in your Rad. the neon green liquid

Answer by  Amber40 (24961)

You should not have any oil in the radiator. There should only be clean coolant. Make sure that it is not automatic transmission fluid. Some radiator have build in trans-coolers that can leak. If your sure it is engine oil then that means you some internal engine problems. This typically indicates that you have a cracked block or other leak.