I’ve bought and used this product twice, when doing my own oil changes. It has settled down my oil leak (while not stopping it completely), and fresh oil seems to retain its consistency for a longer period of time.Since I’ve only just started using this product, it can’t be the reason why my ‘05 Honda Civic is still running well at 426,000 miles, but it’s certainly the product I’ll continue using to condition a tired engine, which would otherwise not have TOO much life left in it…

This product worked for my car. I have a 1981 Datsun 280zx, at around 35k miles she started smoking a bit. burning oil , fouling out the spark plugs which then caused misfire and you know the rest. She does not Leak oil at all, but the smoke/smell was getting progressively worse. I was fearing a valve seal/guide issue or even worse a piston ring/ engine overhaul, I decided to take a shot. replaced all spark plugs with NGK, changed the oil to Valvoline VR1 Racing 10w30, and replaced QUART of…

Caused P2646 error due to oil with high viscosity. It did fix the oil leak though… but I do not recommend. That's my feedback.

I’ve used many oil additive products, including Lucas and even other Bar’s Leaks products, and none of them worked as well as this one. I own a 2001 Ford Expedition, that had a fair amount of oil leaking out (around a quart or better a month). I put this in with one of my oil changes, and I haven’t seen a drop of oil since. Great product worth every penny.

My 2011 Buick Regal was burning oil bad. I add one of these to my oil when I get a oil change and there is no issue of burning oil now! You have to do it each oil change and you will not burn anymore oil! Awesome product!