Top critical review
128 people found this helpful
May Not Fix Every Leak
on December 21, 2012
I have a 1994 Hyundai Scoupe that I use for short trips around town and back and forth to work. My old friend sprung a leak from the rear main seal that was DRAINING oil at approximately a quart in 15-20 minutes with the car running. I took it to a garage and they wanted more money to fix it than the car is worth. The first day I used AT-205 and ran the car for an hour and a half the leak stopped. However, the next time I started the car to run it for a another hour or so the leaked returned so it appears that AT-205 was only a short term fix. The bottle says it takes 5 hours to seal a rear main leak so I may run it for another hour or two and see what happens. All in all, it's still worth $10 to try as long as you buy it with the understanding that it is not going to fix a completely damaged or crumbled seal. I may take another reviewers advice and try a second bottle since the leak did stop after the first bottle but later returned.
Update (12/31): I was on my way to bring my car to a garage for repairs. Before going I refilled my oil with the oil / AT-205 that leaked out the second time I started the car after adding AT-205. On my way there I decided to pull over and look for a leak. To my amazement, the once gushing leak from the rear main seal was reduced to a mere drop at a very, very slow rate. I noted one review said it took almost three weeks for their leak to completely stop so I'll continue to drive the car and update accordingly. At this point I would have to say the AT-205 actually works. My car's oil leak was about a quart every 15 minutes and as of today has been reduced to a mere drop every 10-15 minutes.
Update (1/1): The leak returned. The car is in the garage for a rear main seal replacement costing $400. Do I regret buying AT-205? No. While it seemed to work at first I don't think any gasket conditioner will completely repair a badly damaged gasket or seal. However, IMO it is worth taking a chance on AT-205 prior to spending hundreds of dollars on seal replacements. I do believe most (not all) of the reviews on Amazon are from real people who have actually used the product and based on the mostly positive review of AT-205 I would recommend at least taking a chance that it may work for you.