The Ford Barn

Nick in Fayetteville · 07-07-2022, 10:08 PM

Is anyone adding Marvel Mystery Oil to the coolant in their radiator? If so, how much? I have heard that it keeps rust down and lubricates the water pump.

51504bat · 07-07-2022, 10:36 PM

I've heard of using MMO in the oil and gas tank but never in the radiator. IMO there are better commercial water pump lubricants but that's JMO.

J Franklin · 07-07-2022, 10:53 PM

Buy waterpump lube for radiators and use that in the radiator.

TerryH · 07-07-2022, 11:16 PM

First time I’ve ever heard of that one………

Certimafied · 07-07-2022, 11:28 PM

I bet it would work as a rust inhibitor, just wonder if it would do anything to the rubber hoses? Regular oil would attack the hoses eventually, not sure about Marvel Mystery Oil though.

CWPASADENA · 07-07-2022, 11:50 PM

Sponsored Links (Register now to hide all advertisements)

Do not use MMO in the radiator. Use a water pump lubricant or water soluble oil.

Chris W.

Big hammer · 07-08-2022, 09:15 AM

Quote:

Originally Posted by Nick in Fayetteville

Is anyone adding Marvel Mystery Oil to the coolant in their radiator? If so, how much? I have heard that it keeps rust down and lubricates the water pump.

Don’t think it would mix with water, if your using ant-freeze why would you add it

ETAModel · 07-08-2022, 02:00 PM

Dad always said MMO would fix anything from a Ferris Wheel to a Broken Heart.... but this is a new one for me. I too am wondering how it would react with antifreeze.

Werner · 07-08-2022, 02:37 PM

Hi Nick,

MMO is a thin white oil with detergents. It is not soluble in water. When it comes in contact with glycol (radiator antifreeze) it will result in muddy breakdowns. Ergo: Yes for the gas tank, never in the radiator!

Dino's A · 07-09-2022, 12:45 PM

Never put MMO in the radiator. Distilled water & soluble oil. Or coolant if
you choose. I only put some MMO in the gas tank to give it a light coat
of oil to help keep rust at bay.

07-07-2022, 10:08 PM	#1
Nick in Fayetteville Senior Member Join Date: May 2010 Location: Fayetteville, NC Posts: 341	Marvel Mystery Oil Is anyone adding Marvel Mystery Oil to the coolant in their radiator? If so, how much? I have heard that it keeps rust down and lubricates the water pump.

07-07-2022, 10:36 PM	#2
51504bat Senior Member Join Date: Sep 2013 Location: SoCal-Redlands Posts: 3,013	Re: Marvel Mystery Oil I've heard of using MMO in the oil and gas tank but never in the radiator. IMO there are better commercial water pump lubricants but that's JMO. __________________ Making the simple complicated for over 30 years.

07-07-2022, 10:53 PM	#3
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 5,959	Re: Marvel Mystery Oil Buy waterpump lube for radiators and use that in the radiator.

07-07-2022, 11:16 PM	#4
TerryH Senior Member Join Date: May 2010 Location: Fountain Valley, Calif. Posts: 937	Re: Marvel Mystery Oil First time I’ve ever heard of that one………

07-07-2022, 11:28 PM	#5
Certimafied Member Join Date: Aug 2020 Location: Belmont N.C. Posts: 85	Re: Marvel Mystery Oil I bet it would work as a rust inhibitor, just wonder if it would do anything to the rubber hoses? Regular oil would attack the hoses eventually, not sure about Marvel Mystery Oil though.

07-07-2022, 11:50 PM	#6
CWPASADENA Senior Member Join Date: May 2010 Location: PASADENA, CA Posts: 1,882	Re: Marvel Mystery Oil Sponsored Links (Register now to hide all advertisements) Do not use MMO in the radiator. Use a water pump lubricant or water soluble oil. Chris W.

07-08-2022, 02:00 PM	#8
ETAModel Senior Member Join Date: May 2013 Location: Along the Red River, Texas Posts: 360	Re: Marvel Mystery Oil Dad always said MMO would fix anything from a Ferris Wheel to a Broken Heart.... but this is a new one for me. I too am wondering how it would react with antifreeze.

07-08-2022, 02:37 PM	#9
Werner Senior Member Join Date: Jan 2019 Location: Germany, near Aachen Posts: 1,153	Re: Marvel Mystery Oil Hi Nick, MMO is a thin white oil with detergents. It is not soluble in water. When it comes in contact with glycol (radiator antifreeze) it will result in muddy breakdowns. Ergo: Yes for the gas tank, never in the radiator! __________________ Beste Gruesse aus Deutschland, Werner Ford Model A, Roadster, 1928 Citroen 11 CV, 1947 Hercules W 2000, 1976; (with NSU-Wankel Rotary Engine), Canadian version

07-09-2022, 12:45 PM	#10
Dino's A Senior Member Join Date: Jun 2016 Location: Arcadia, Ca. Posts: 251	Re: Marvel Mystery Oil Never put MMO in the radiator. Distilled water & soluble oil. Or coolant if you choose. I only put some MMO in the gas tank to give it a light coat of oil to help keep rust at bay.