NO LEAK 20401 Engine Oil Stop Leak, 16 Fl oz.

this stuff works and doesn't harm engines. in fact, all the No Leak products actually stop leaks and I've been using all of the products for years in all my old vehicles. it will not stop catastrophic leaks. it does reseal leaking gaskets and seals, but you have to put more in every time you change your oil.

stopped oil leak min my 2007 Cadillac DTS which happen to be notorious for leaking after 80k saved me about 6,000 in repairs unbelievable.

Not sure if it works, I have 352K mileage on my 5.7L Toyota Tundra that has oil seepage

Update: As I said earlier, the leak stopped. My clutch master cylinder began leaking and replacing that plastic part involves taking half the truck apart! My mechanic replaced the main seal. He said that the old seal had swelled about double in size and was bulged way out. I poured this bottle in and drove for 2000 miles. Perhaps a person should only drive 500 miles before replacing the oil to help avoid over swelling. ...........................It is good at making a seal swell. Perhaps a bit too good?I used this on my F150 after learning that main seal leaks are common on my 4.9 liter straight six. It has worked so far. No more stains on my driveway. I hope that it continues to work.

Car dropped a couple drops each time I parked. Over a year, I tried 4 different products. None worked at all. NO LEAK was a bit slow to work but after I took a trip, the leak has stopped. Better than the multi-thousands I was quoted to have a garage tackle this problem.

Car still leaks

Mechanic said the rear seal needed replacing ($350 on a grand caravan) and i had already noticed that the leak was pretty bad. I followed the directions and then drove 500 miles (plus another couple hundred since) had have not seen a the oil level drop at all. I'm not sure if i'll need to use another bottle after the oil gets changed, but "No Leak" certainly saved me money in the short run.

Still leaks

Se utilizo en motor 4.2l. Vehiculo americano. Si se termino el goteo. Pero el problema era mas bien la valvula PCV que se debia cambiar para reducir consumo de aceite, y que ocasionaba que el aceite tambien se terminara fugando y apareciendo en diversos lados del motor.

good

Compré coche sin saber que tiene pérdidas de aceite, 1litro cada 2.000 -2.500 km aprox, según trayectos (el anterior dueño con toda su "honradez" dijo que era normal... que rellenara, lo dijo una vez comprado, mucha cara...). Este producto hizo que perdiera menos, del orden de 1litro cada 3.500 km, durante unos 8-9 meses, después volvía a perder al mismo ritmo.No hace milagros y la averia es más que de sellar juntas, pero hace el apaño hasta que el motor no de más de sí y pierda aceite a mayor ritmo, de momento me sirve para revisar el aceite cada 2 meses en vez de cada mes.

Super soddisfatto. La mia BMW 2.0 N46, aveva un problema di fumosità blu se lasciata da calda qualche minuto al minimo e poi si dava un accelerata. Mi hanno preventivato 2000 euro per rifare i guidavalvole e ma si sono riservati di raddoppiare, se toccava rifare anche le fasce elastiche. Per ora dopo aver percorso circa 200km il problema è sparito completamente. Ho fatto circa 1500km e x ora nn posso dire altro se nn essere contento.

Completely stopped my old car from dropping oil. Takes the 300 km to do this so users must be patient. It does not work immediately!