OT: Motor oil in power steering

The man that changed my oil in my 2002 Blazer today had a senior moment and put about a cup of motor oil in my power steering. The motor was never started and he sucked the oil out of the reservoir and put in new oil. Should I have it flushed or do you guys think it will be ok.

Should be fine. What little motor oil that is left won't hurt a thing.

Gary

Thanks.

relax ,,no big deal ... i put used motor oil in my 430 case psterin unit for 3 yrs before i finally put in the seal kit .. worx fine ,,but this is dependable Case buitl in the same era when GM built quality ... not modern j-m junk ...

Just don't put it in your brake reservoir. When I was out of town my teenage son dumped power steering fluid in the brake reservoir of my pickup. By the time I returned, everything had to be replaced: master cylinder, wheel cylinders, calipers, antilock brake actuator and proportioning valve.

To MARKB_MI.
Having been a mechanic all of my life I would
say that motor oil would not harm your brake system. a good flushing rinse, and maybe new
piston cups, in case the rubber formula reacted
with petroleum base product, should get you
going! All new??? Someone played you for a sucker
and/or was too lazy to replace cups,(depending
on how long theyed been exposed to oil)and found
it easier and more profitable to replace..
Oil would not harm metal and plastic parts.

oil in a brake system will swell up the rubber parts like a poisoned pup

Not sure on whether it will hurt it but I know that the power steering oil on our Kubota tractor is regular 10W30.

Well, Greygoat, considering that the guy who did the work was me, I guess I played myself for a sucker.

A little more detail: First, it was power steering fluid, not motor oil. Not that that makes any difference. I realized there was a problem when my son comes home and the PS pump is howling. I said, "you'd better put some fluid in there" and he says "it's full!". I say "aw-sh***, WHERE did you put the fluid?". He says "Well, I couldn't get a hold of you so I called my uncle (my brother-in-law) and he said to just look for a reservoir and pour it in".

I knew I was in trouble because rubber thing that goes under the master cylinder reservoir cover was already swelled up so big that you couldn't hardly get the cover on. The brake light was on and you could tell that the master cylinder was failing. Also, the gaskets on the antilock actuator were starting to bulge out (GM rear wheel only system). So I knew at the very least I was going have to replace the master cylinder and flush the system. So that's how I started, but by the time I was done I'd replaced everything but the front calipers. I just popped the pistons out of the calipers and cleaned everything up real good, since they were almost new. The rear wheel cylinders were cheap, and you can't get repair kits anymore anyway.

Trust me, I would not have replaced the antilock actuator and proportioning valve if I didn't have too, those are expensive items.