blackhawkxx Posted August 25, 2020 Share Posted August 25, 2020 About fifteen years ago I changed the transmission fluid in my truck and had bought too much. I'm thinking of changing the trans fluid in my current vehicle that uses the same oil and wondering if the unopened Motorcraft Mercon V is still OK to use? I kind of hate to throw it away and buy more if there is no issue. Quote Link to comment Share on other sites More sharing options...
rockmeupto125 Posted August 25, 2020 Share Posted August 25, 2020 I'd use it. 1 1 Quote Link to comment Share on other sites More sharing options...
SwampNut Posted August 25, 2020 Share Posted August 25, 2020 Blackstone Labs tested oils that were many decades old, some bordering on a century, but still sealed, and found no degradation. If it meets the current standard you need, no risk. Quote Link to comment Share on other sites More sharing options...
blackhawkxx Posted August 25, 2020 Author Share Posted August 25, 2020 33 minutes ago, SwampNut said: Blackstone Labs tested oils that were many decades old, some bordering on a century, but still sealed, and found no degradation. If it meets the current standard you need, no risk. Thanks. Quote Link to comment Share on other sites More sharing options...
Furbird Posted August 25, 2020 Share Posted August 25, 2020 The going rumor is you need to shake it up first as it may separate out. I've heard that synthetics are prone to this, and the oil will come out in distinctly two different colors. I always shake the bottles no matter how old they are so can't confirm this personally. Quote Link to comment Share on other sites More sharing options...
SwampNut Posted August 25, 2020 Share Posted August 25, 2020 That's a great point, and something they commented on in the Blackstone tests, but don't recall the details. Quote Link to comment Share on other sites More sharing options...
blackhawkxx Posted August 26, 2020 Author Share Posted August 26, 2020 3 hours ago, Furbird said: The going rumor is you need to shake it up first as it may separate out. I've heard that synthetics are prone to this, and the oil will come out in distinctly two different colors. I always shake the bottles no matter how old they are so can't confirm this personally. I will, why not but as long as it all gets dumped in I would think it would mix together anyway. Quote Link to comment Share on other sites More sharing options...
superhawk996 Posted August 26, 2020 Share Posted August 26, 2020 No way, it's junk now. Send it to me for proper disposal. I've seen sediment in oil bottles and don't know if that's good stuff that searated out of the oil or junk that was in it and not filtered out in the processing. I asked an "oil expert", I think it was someone at Amsoil, and he said that if there was any separation to throw it away because that means the oil is fucked. The rumor is that the more complex the oil the more likely it is to go bad sitting. Makes sense, more additives more chances of something not jiving. If the stuff you have still looks & smells like new stuff I'd use it, if not I'd toss it. A few bucks worth of fluid vs. a potential rebuild. Quote Link to comment Share on other sites More sharing options...
XXBirdSlapper Posted August 26, 2020 Share Posted August 26, 2020 Works well for burn outs. A small puddle in front of my buddies house helped keep the street covered in fresh rubber. Quote Link to comment Share on other sites More sharing options...
superhawk996 Posted August 26, 2020 Share Posted August 26, 2020 Build an anti-chase oil slick sprayer and dump the fluid into the tank so it'll be repurposed instead of wasted. Add burnout sprayers to your tires for on demand spectacular smokeouts. Quote Link to comment Share on other sites More sharing options...
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