BlueDevil Products 49499 Oil Stop Leak - 8 Ounce

I have a rear main seal leak in my '06 Honda Ridgeline. It started about 15K miles ago roughly. I put in the Blue Devil Rear Main sealant first and it worked for a while. It went from about 10 drops a night to a couple. then completely stopped for a while. After a period of time (not sure exactly since I stopped checking assuming this might be a permanent fix) I noticed the leak had returned. Upon my next oil change I moved to this product, which according to sources is a stronger stop leak. This works better but the leak did return eventually. On my 2nd bottle of this product, I changed my oil early (for a different reason) during the period of time when the leak had stopped...so I added a 3rd bottle to fresh oil at a point where the leak was stopped. For clarification, except for the first bottle of the rear main seal stop leak, my practice has been to add one bottle when changing oil. Hopefully, I can get ahead of the issue with fresh Blue Devil on an already stopped leak? Dunno---not holding my breath. It works good enough that I would recommend it. It seems effective if you have leaky seals, but I am not sure it is a permanent remedy.

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

This product does what it says, but you have to be patient. I recently had an oil leak on my truck. And since it's been the first time I've ever had anything like that in any of our line of cars in my family, I figured I'd test this out before I get down and work on the main-seal gasket or head-gasket. Afterall, its almost winter and I need the truck to head to Tahoe, every chance I have. I pour the whole bottle in the crankcase, and after driving it a couple of hours it didn't seem to make much difference. Then I did the same the following day, and I began to see less oil consumption. Lately, it seems to just drop one drop every now and then. I would look at it as the best patch-job in the market, but will consider tearing the engine apart in the summer and fix the leaking problem permanently.

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

Didn't work.

I ordered this product twice. The first time I used it on a zero turn mower's hydraulic system. I contacted the company and explained that this particular zero turn uses motor oil for the hydraulic system and that one of the wheel motors had started to slowly leak, probably 3 or 4 drops per day. The company got back with me very quickly and suggested that I use their regular motor oil product and not their hydraulic stop leak product. Taking their advice I purchased the motor oil product and followed the instructions on the bottle. It has been about 3 months now and the wheel motor hasn't leaked a drop. Since I had such a positive experience I decided to roll the dice again and attempted to arrest a slow engine oil leak on my Dodge Grand Caravan. Again I followed the instructions on the bottle and the leak stopped....for 3 days. I began to notice thin oil drops on the 4th day and now the vehicle leaks at about the same rate as before I used the product. I have one more vehicle with a slow engine oil leak and i have not yet decided whether to attempt this quick fix on it or not.

Stopped the oil leaking from 2011 F 150 seals…saved $2700

It’s like water