BlueDevil Products 00234 Rear Main Sealer - 8 Ounce

I have a 2009 F150 with over 337,500 miles on the original engine. It developed a persistent rear main seal leak about a year ago. Having called the local dealer, I was quoted labor only of $1,900 to repair this leak. I went on Amazon to see if there might be anything out there that would help. I purchased this Blue Devil pour and go rear main sealer and had it delivered next day, put it in the crankcase as instructed and drove to Ft. Lauderdale (200+ miles roundtrip) So far, after about 400 miles, it looks to me that the leak has stopped. I'm hopeful that it stays stopped and will no longer be a mess on my paver driveway!! I recommend this product based on this outcome.

Blue Devil has always been a great product!!

Ok so I have a 2008 Cadillac Escalade EXT. 6.2 and all wheel drive. About 100K miles and it has had a minor oil leak for about a year or two. Talking a couple drops on the driveway overnight. Then after a road trip towing my camper around 200 miles total I did an oil change and the next day the oil leak was massive. The day after changing the oil I got the "low oil pressure, shut off engine!" alarm. It was at that point I cold see oil dumping out while idling. It was a consistent drip to the tune of 2 quarts a day on my daily commute which is only 30 miles total. Upon searching for the source I was able to see it was the rear main seal. I tried the Blue Devil RMS product. It did slow the leak but I was still losing at least a quart of oil every 30 miles or so. Now my truck is in the shop getting the rear main seal replaced. This job calls for the transmission, transfer case, cross members, drive shafts and exhaust system to be removed to replace this $30 seal. While the truck was at the shop and the trans removed I asked the shop to change the oil pan gasket as well because with my luck the oil pan gasket would start leaking a month later. Total cost is $2,000 for the rear main seal and oil pan gasket. I wish the sealer would have worked, but I guess my leak was way too much for it.

Did just what it was supposed to do very well It stopped a full scale flow

Do not buy this if you have 3.5 Honda engine or possibly any engine with VCM. Ran this for my wife’s 2008 Pilot for one day and it clogged the VCM module causing low oil pressure and forced the car into limp mode. Fixed after i changed the oil and ran MMO beforehand. Do not use this product if you’re a Honda owner!

I was skeptical when I first try this product on my 2001 Jeep Cherokee. The jeep has had an oil leak for many years; it wasn’t a large oil leak, but big enough to leave an ugly spot on the garage floor. I used a piece of cardboard under the truck to catch the oil drip, but knew I had to do something before the leak got any worse. Of course, the right thing to do was to replace the main seal, but I recently had knee surgery and getting under the truck to drop the transmission was out of the question. I’m not sure how I came across this product, but I’m glad I did. The day the sealer was to arrive, I used a pressure washer and some rags to clean oil residue from under the engine and transmission. The BlueDevil Rear Main Sealer arrived on Aug 29, 2018. I poured the whole bottle in my jeeps engine on that same day and then just drove the truck normally. I drove it to the store and did some other errands. When I arrived at home and before parking my truck, I placed a clean piece of cardboard on the garage floor to catch the oil drip. On the following day, I checked the cardboard under the truck and there was a new spot of oil. I reasoned I had just wasted $11.99 for the product and didn’t think anything else about it until today, Sep 20.2018. So, I went to check, not necessarily to see if the product worked, or not, but whether the cardboard was too saturated and needed to be replaced. But to my surprise, the cardboard didn’t have any new oil spots and aside from the spot when I first poured the sealer, it was nice and cleaned. I also checked under the engine and transmission but didn’t see any indication of any oil leak. So, I must say that this BlueDevil Rear Main Sealer really works. I cannot say for how long, but for now, I’m very satisfy with the results.

Doesn't work. If your car has a leak just fix it. All this does is slow down the problem.

Used products on two classic cars, seems to work well.

I used this 2 times now the leak never came back. The first time I used it I was really sceptical about this product still leaking for two days but as I drive along the leak suddenly disappeared. So when I did my oil change I pour another bottle no more leak up to now. I think it does its job kudos to the seller and kudos to bluedevil.

worked as described

Used as instructed. Leak is the same

Good product

After a couple of weeks it seems to be doing as advertised, time will tell.