Re: Converitble Top Hydraulic Fluid Options - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: Converitble Top Hydraulic Fluid Options
Posted by Tim (more from Tim) on Mon, 14 Mar 2011 07:21:42
In Reply to: Converitble Top Hydraulic Fluid Options, TJ, Mon, 14 Mar 2011 05:19:59
Instead of Mobil-1, I use regular Mobil 10w30 in summer, 5w30 in winter. The thermo-mechanical stress in the convertible top mechanism can not compare to what happens in tne car engine or turbo. The main advantage of the "liquid gold" fluid that is factory fill is its long-term stability . . . that only matters if it's intended to stay in the car for 10+ years. If we have a leak, which is a cause for the low fluid, then whatever fluid we put in is not going to stay there for long. The leak solves its own fluid cost problem. Am I seeing the silver lining or what. LOL. It's a perfect way of using up my ancient non-synthetic engine oil that I had purchased before having Saab's . . . until the leak slowed down, see next paragraph.
The leak itself can be slowed down and stopped by various Lucas stop-leak products, according to some of the articles that I read from other owners. I tried the Lucas transmission stop-leak, which is a very thick pink "goo." Placing a small amount (a couple squirts, that's the scientific measurement, LOL, probably a couple table-spoon's worth, about 30mL) has slowed down my top fluid / leak rate from requiring refill every couple months to haven't required any refill in six months. I do use the convertible a lot, practically whenever it's above 45F out and not raining. Don't put in too much of the stop-leak stuff though, as the stuff effectively raise viscousity of the fluid; better to start with just a little, and see how effective it is before adding more. Try to use as little as possible. The top mechanism will complain in low ambient temperature if the fluid is too thick/viscous.
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