mci 9 power steering fluid

aerialad · August 29, 2016, 07:33:27 PM

can I use motor oil as power steering fluid in 1983 mci 9

flynbanjo · August 29, 2016, 09:03:46 PM

I have an 81 mc9 and I had the same question. I called MCI tech support and they recommend the same oil that you would put in the engine. Straight 30 wt.

ol713 · August 29, 2016, 09:25:50 PM

I have an 8v-71 that uses straight 40 wt oil. Have always used
40 wt in the power steering also.
Merle.

thomasinnv · August 30, 2016, 06:28:32 AM

Quote from: flynbanjo on August 29, 2016, 09:03:46 PM
I have an 81 mc9 and I had the same question. I called MCI tech support and they recommend the same oil that you would put in the engine. Straight 30 wt.

I think you mean 40wt?

Dave5Cs · August 30, 2016, 06:58:41 AM

Dextron ATF III because that is what was in it when I got it. Red in color. TRW- Ross
Dave

flynbanjo · August 30, 2016, 10:24:02 AM

What was I thinking? You guys are right. I meant 40wt. That will teach me to think after midnight.

Scott & Heather · August 31, 2016, 07:36:31 PM

Think about this:

If the steering pump seal ever leaks (as it is on my coach) then the oil you have in your power steering system/reservoir will leak into the engine internally....which would you rather have? 40wt motor oil or transmission fluid leaking into your engine?

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