I have a 2003 Infiniti G35. It has about 160k miles on it. I know that there is a very minor upper oil pan leak, small enough that no oil is dripping on my driveway. There is some oil residue gunk on the skid plate below the engine and that is about it. The engine is also not consuming any oil. I was thinking of putting a quart of lucas oil leak stop in with my next oil change along side a 5w-30 oil instead of the usual 10w-30 used in the past. Both viscosities are ok to use in my car. My thinking is that the engine is old and adding this could help prevent any further leaking and could stop the existing leak all together. Is this a good idea or should I just ignore the leak. I don't want to replace the upper oil pan seal as it is quite a process and the leak isn't that bad. Has anyone used this product before? Any thoughts on what to do?