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Can you tell what kind of oil it is? ie: is the oil red? Many automatic transmissions use an oil cooler internally in the bottom/side tank of the radiator. If this has ruptured inside the rad, it will be leaking ATF into the coolant. Check your transmission level, and see if it is down.
Easiest and cheapest fix is to take the two cooler lines off and loop them together, and then plug up the fittings on the radiator. I would only advise this on an older vehicle you do not tow or haul heavy loads in. The next option would be to install an auxilliary oil cooler in front of the rad, hook your lines up to that, and again plug up the fittings on the radiator.
What kind of vehicle and engine is it?
Many diesel engines use an engine oil cooler, that also will push oil into the cooling system if it leaks internally. Only solution in that case is installing a new cooler.
Hope this helps, but could give better info with more detail from your side.
Good luck
What else can I help you with?
Why does motor oil goes in your radiator ford 5.4?
The most typical reason is a blown head gasket(s).
Oil film in car radiator?
Oil in the radiator is usually an indication of a leaky head gasket.
What causes oil in radiator on 1997 7.3?
Usually you get oil in your radiator when you blow a head gasket and oil leaks into your radiator. Blown intake gasket is also possible, as well as a hole in the engine's water jacket (very uncommon). Also, if the vehicle's transmission cooler coil is internal to the radiator, a leak from it may be possible (most tranny coolers are external for this reason).
Why would there be oil in the radiator and no water in it?
Bad Head Gasket. See a mechanic ASAP..
Your radiator is bubbling could your broken water pump be causing this or is it for sure a busted head gasket?
if you are getting water in your oil its eather a busted hear or head gasket if no water in oil it could be water pump
Why is oil in your radiator?
you have a warped/or cracked head,or blown head gasket
Why is there oil in your radiator?
you have a warped/or cracked head,or blown head gasket
Why would there be Water and oil mixed in radiator 1999 suburban 1500?
Blown head gasket.Blown head gasket.
If you have low oil pressure and oil in your radiator what does that mean?
blown head gasket
Why is there radiator coolant in engine oil?
Blown head gasket - warpped head - or both.
What causes oil in the radiator?
hi, blown head gasket, cracked head or block or automatic transmission oil cooler in radiator leaking
Oil in radiator 2002 Chevy trail blazer?
You have a blown head gasket or a cracked head.
Why is there engine oil in my radiator coolant in my 1994 Ford Aspire?
blown head gasket
How can oil get into the radiator water reservoir of a jetta TDi 2006?
blown head gasket or cracked head.
How do you stop oil from going into a radiator on a 94 Honda Civic dx?
Oil in the radiator is a sign that you have a blown head gasket. The head gasket will have to be replaced. STOPdriving this car immediately or you will destroy the engine.
Why is there oil in the radiator of your 1999 plymonth breeze?
Usually oil in the radiator or coolant in the oil is either a blown head gasket or a cracked head or block. Most often it is the gasket.PatPortland, OR.
What causes oil to get into radiator reservoir on a 1989 Festiva?
The most likely is a blown head gasket.
