Posted: Mar 18 2008 at 5:06pm | IP Logged

Boomer,

Nissan p/s fluid is not the same as ATF, though I doubt that ATF would cause much of a problem. P/S fluid is a hydraulic fluid that doesn't run at up to 300degrees or have clutch plates in the system like the transmission, so it is formulated differently and has different additive packages. I wouldn't run it in your new truck unless you want to take the chance of voiding your warrantee.  Nissan p/s fluid is $2.79 from www.mynismo.com which really isn't that much more expensive than any other p/s fluid, at least not here in California.  You can get factory Nissan ATF(expensive) P/S fluid, air filter, cabin air filter, oil filter, drain plug gaskets, belts & hoses etc... for really good prices.

I do the same thing. Spending a couple extra bucks every oil change to change out your p/s fluid will prevent a VERY expensive rack and pinion from going bad prematurely, not to mention the pump. I also drain and refill (not flush) the trans. every other oil change because most of my driving is around town.

Posted: Mar 19 2008 at 6:24pm | IP Logged

If the dealer said OK, then OK.  Any oil of the same viscosity will work for a hydraulic system, the problem comes in when there are additives that make the seals swell.

So, if they don't use their own p/s fluid, I wonder if they use their own ATF?  Most if not all quick lube places only use Dextron III and add an additive to it like Lubeguard, so, I wonder if they do the same?