[Shop-talk] Another Hydraulic fluid question

[Steven Trovato]

OK, while we're on this topic, I have another question.  I have a 
boat that has hydraulic cylinders that raise the outdrive.  A switch 
turns on a pump, which supplies the fluid to two cylinders, and they 
raise or lower the outdrive.  Simple enough.  The special hydraulic 
fluid is 5 or 10 bucks for what looks like a big toothpaste 
tube.  Manual says to use their magic juice, or ATF.  So, is their 
any reason I want to pay for their special stuff?  This isn't the 
first time I've run into this situation.  I've seen similar 
recommendations with tractors and other equipment.  Sometimes they 
say they prefer some special fluid, but you can use ATF.  I'd always 
prefer to use the special stuff if it will prevent problems, but 
sometimes I think it is just a way to separate customers from their 
money.  Thoughts?

-Steve Trovato
strovato at optonline.net