Sure you can drive it but, you need to ask yourself, why is there oil in the radiator? If you did not pour oil in the radiator then you have a problem. Most likely cause is a blown head gasket. This is extremely serious, and will destroy the engine if not repaired.
Oil in the radiator is usually an indication of a leaky head gasket.
Get a new radiator or flush it out?
Behind the radiator on the drivers side of a R/H drive car, Just above the engine undertray
Circulating water will not be sufficient and the car will overheat.
if you have tansmission cooling lines or oil cooling lines that go into the radiator, the cooler in side might have a hole in it.
It depends on how many miles you drive, and how long you want your car to last.In General you should replace the engine oil and filter, the transmission oil and transmission filter and drain and replace the radiator coolant.You should also replace your air filter,and if your car has an external fuel filter, replace it.If you drive a lot of miles, your engine oil may need to be change sooner.
Car radiator flush sold as most automotive shops
No! (Laughs)
for towing and heavy-duty use.
You can use plain water to get sludge out of your car radiator. You can use Marvel Mystery oil to remove sludge from the oil pan.
Oil in the radiator indicates a possible severe problem, where coolant could also leak into the oil. Driving an engine in this situation at all could lead to severe engine damage.
If the car has a transmission cooler in the side tank of the radiator, yes. This set up is very common.