BlueDevil Products BlueDevil Oil Stop Leak by

Worked shocked seal was weeping on a timing chain cover stuck it in and bang no not the engine and the weep had gone

Had slight oil drip off head gasket. now just a damp pach (no drip) passed it mot with no Advisory.

paid for something that was meant to cure a small leak on a rocker cover gasket did not work wast of money

Marvellous

does what it says on the tin

my head was leaking oil into the coolant/radiator , and overflow bottle , it was full of it , i drained the radiator, plug at bottom realised the rad was saturated with oil as i could not fill it up , i changed the rad , easy job, i have no experience, did as it said on my 2007 civic ,i was shocked but it really worked, my wife has a client he said his car has done 20k since and still going, you must clean out rad and use a flush for coolant system ,it goes in the rad , gl

Didn’t work, this was an expensive project, I should have put the money towards getting the leak fixed (which I done) rather than waste money on this product that failed to deliver.

Tried this product . Didn't realy stop my leak

Excelente sellador de fugas de aceite, lo envié a 2 talleres no encontraron la fuga y lo probé y al momento se detuvo la fuga, seguí las instrucciones estoy feliz me ahorre un buen dinero.

BlueDevil Oil Stop Leak worked exactly as advertised after a leak recently appeared in my valve cover on a 1998 Toyota Sienna with 455,000 km. After changing the oil, filter and adding BlueDevil I drove the car for 3.5 hours. I have used Amsoil 5w30 synthetic oil for many years without any noticeable oil leaks. I will now change my Amsoil more frequently 3 or 4 times a year as opposed to 2 times per year. Also I will only use Amsoil, because Amsoil is a better synthetic than many other synthetic oils. Very pleased with BlueDevil oil stop leak which stopped the leak. This was the first time I used BlueDevil and am very pleased.

Added this to my car that had oil leak and it worked for a few weeks but then started leaking again . Did not fix problem it may have slightly improved but leak is still there . I was septic from start but gave it a try .

The product worked as advertised

I have a minor rear seal leak and BlueDevil was recommended by a couple of different mechanics. It worked well for several months and I've used it a couple of times. As you may know, these treatments can only do so much, but if the leak is minor enough, it will work for a while. Replacing the rear seal is a very expensive job, so I have no intention of repairing it on a vehicle with 207K miles.