BlueDevil Products 49499 Oil Stop Leak - 8 Ounce

Works great. Be patient. It will stop the leak.

It’s like water

Pretty much same review as I gave their trans. stop leak. Less than a week and 30 yo 4.3 V6 with worn out oil pan gaskets (gotta pull engine to replace) seems to no longer leak. Fingers crossed!

so I have a 30 yo Gator 6x4. Ya know like you see on the golf courses,all of a sudden drops of oil started appearing on the shop floor and more then more and bigger. Dreading the worse and a firm believer in Murphy's Law out of desperation I bought a bottle certain it would not work. We have a 3 acre yard which the wife just putts around in doing her gardening work and from time to time takes it to the pond to fish or the creek to walk it. Next thing I know I look under it and no more drips. My oil dry can be used or other things now but be danged sure I'll be buying another bottle to have handy for the next drip out of who knows what.

I had high hopes for this product, and wish I could have used it in my engine longer. I have a rear main seal leak. I added the blue devil stop leak, drove my truck abound for a little while the first day, it was fine. The next day started off alright then I noticed my oil pressure gauge was a little low. The it started to slowly drop. By the time I made it to work it was at zero and I got warning lights on my dash telling me to stop the engine. After leaving it off a few minutes, I got the same thing. Low oil pressure reading then it would drop to zero. I then replaced oil and oil filter. Ever since pressure has been normal. I’m not sure it the product messed up my oil filter. I wasn’t willing to risk my engine driving around with it reading 0 oil pressure.Update:A week later my check engine light came on. Long story short I had to replace a bank of lifters in my engine. I can’t say it’s related but who knows. I reached out to the manufacturer about a refund but was informed that since I purchased the product from Amazon and not their amazon store that they would not proved a refund. I did however get a refund for the product from amazon.

Doesn’t Stop Leak

Excellent product. It does what it says it will do! Really works well. 😊

My girlfriend’s older 350Z had started to leak oil. It was visible on the concrete where she parked and the smell of oil was strong when exiting the vehicle after driving. Added the stop leak to the crankcase and drove the Z for three solid hours on secondary roads at speeds between 45 and 60 mph, with occasional stops as required before returning to her home. No oil smell upon exiting vehicle. Cleaned the oil stains from the concrete with a degreaser and a stiff bristle brush before parking the Z in its usual spot. Checked the following morning. No oil on the concrete. Ran the engine and no oil smell or leaks detected. This product saved the cost of replacing valve cover and oil pan gaskets, which would have been considerable. My girlfriend is very happy. Thanks for the great product!