Am hoping to keep my car for 1-2 more years (it's 13 1/2 years old, 105K miles, runs well, few repairs). There is a small transmission leak that started in fall, stopped in winter, but I fear may start up again in warmer weather. As I do not drive far or much, I'd like to not repair this and keep it going with a stop leak product, but I have read that I should not use one with additives. Any suggestions? Recommendations? Just don't want to put more money into an old car when it's had a couple costly things done already in 2010 and do not want to get in that vicious cycle of trying to save it when I plan on getting rid of it in 1-2 years. Thank you.