BlueDevil Oil Stop Leak - Permanent Repair & reconditions Rubber Seals, 8 ounces

I have a 2001 BMW X5 which developed a serious oil leak (everytime I stopped, there was a spot). I put a bottle of White Shepard in the oil and after a couple of days of driving, the oil leak was gone except for a small drop here or there. I put in another bottle and after driving for a 3 hrs, not a drop no where. The truck seems to be driving much better also, had white smoke out the back, now no more smoke. I am so pleased with this product, it really works. I'm telling everyone I can about it!!

A couple of months ago my college aged sons Suzuki XL-7 started leaking oil badly. {The vehicle has approximately 200,000 miles on it.} When he would pull up to a stop the smoke would roll out from under the car where the oil had leaked onto the exhaust. Rather embarrassing and stinky for a college kid with a girlfriend etc. The car is only worth about a thousand bucks and the repair shop said it was probably the rear main seal. I told him to try the White Shepherd Oil Stop Leak so he did with an oil change. After a day or two the leak had decreased to the point that it no longer smoked at every stoplight. If he gets a half a year or more out of it that would be good. I'm impressed.

I purchased this product because of the reviews I found on the Web. After application and driving my car (according to directions), and giving an extra three days- I found no change. The oil leak remains the same. I have a classic car, spent a great deal on it, and thought I might save a little money in the short term, but I did not. Save your money.

I had a quite common oil pan leak in a 1997 Cadillac Deville with a Northstar engine. This leak blew back onto the exhaust system, creating a foul oil-burning smell in the cabin and creating a fire hazard when hitting a 700 degree catalytic converter. Because the entire engine must be pulled to replace the oil pan gasket (stupid design), and I was provided an estimate of $3,200 from the dealer to repair the problem, I reluctantly tried White Shepherd as a last-ditch effort to avoid the expensive repair (I really did not want to put any kind of so-called miracle cure in my motor oil). Because the Northstar engine holds 8 quarts of oil, I added one and a half 8oz bottles of White Shepherd and immediately drove it non-stop for a 2.5 hour period. I am shocked that there is no more sign of oil on the undercarriage (except the now-dry stains where the oil previously collected). The engine ran just a smooth, and the engine temperature remained the same (200 to 220 degrees). It has only been one day since I used this product so I do not know how long it will hold up, however, so far, I am highly impressed! BTW, I know it was the oil pan because I had previously cleaned the entire area with Gunk and drove the car 100 miles. There was no oil above the pan, only from the pan seal and below. The oil was also leaking from the entire perimeter of the pan (at least the areas that are visible while on a lift), not just in one spot - this was a bad leak. No more!

Seem to work for about a week or so only so far as stopping the week altogether. Afterwards it did start leaking slowly again but still better than it was.