OK to use engine oil as ATF replacement?

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sorry M1, you're logic and reasoning is seriously flawed. i wouldn't drive that car 2' until it had the PROPER atf in the transmission. the repair shop and tow truck dude is gonna love you!
 
I would take a Corolla over a Bently! Prob. Lasts longer knowing British engineering! hehehe
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I love to have some reading materials on this topic. As of right now, there is a lot of speculations.
 
i have an irrational fear of automatics, even though i drive one. i don't really understand the fluid stresses and requirements. but, engine oil for the engine and ATF for the tranny. You could take it for a spin to check it out (at your own risk), but I would consider getting it flushed even if its "only" a 92 corolla and your 5th car.
 
Quote:

Question:
Difference Between Motor Oil and Transmission Fluid
I work at an auto parts store and customers ask the difference between motor oil and transmission fluid. What would your explanation be? Quick and simple - to the point.
-- Tim McIlhenny, Bremerton, WA
Answer:
Motor oil is for your vehicle's engine. Transmission fluid is used by your steering system to keep its parts moving smoothly. A couple of differences are the following: 1) an engine is designed to deal with the products of combustion, whereas an automatic transmission fluid (ATF) does not see contaminants from fuel burning. An ATF is basically a closed system and the lubricant must last for a long period of time. An engine oil must be drained to remove contaminants after a relatively short time/or mileage compared to an ATF. Similar additive component types are used, but at different levels and different chemistries. In an ATF, clutch friction is a very important consideration.


is it just me or did someone miss the pot second sentence of the answe? while some PS systems use ATF I think someone cut and pasted from the wrong source ha ha.... go mobil
 
Given the fact that, many years ago, the California Highway Patrol had a requirement that their vehicle automatic transmissions had to function correctly with the same oil used in the engines, one wonders just how that would work in todays' automatic transmissions with todays' oils.

I see that many are sure that disaster would ensue if only a slight amount of motor oil was put in a transmission, but I wonder how many have actually done this and observed the result.
 
Originally Posted By: andyd
This is a 92 Corolla guys, not a freaken Bentley. Drain it and it refill. Fuggeddaboutit.


Right on.. A little motor oil won't hurt it. Way back when, we used motor oil in auto trannies, usually because we has a bad leak and motor oil was cheaper.

I had a 51 Lincoln that used a GM hydromatic trans. I used to put a quart of 50 ND a month in that thing. Ran just fine, Shifted a little sluggish when cold.
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I would have the system completely flushed out, a pan drop and filter replacement. Odds are you'll be fine after that, just do it ASAP if you haven't done it already.

Frank D
 
If you don't want to do the cooler line flush at home, do multiple drain and refills. Instead of driving 1k miles as you propose between each drain and fill, drive 30 miles between each drain and fill. On your last drain and fill, I suggest a high quality fluid like Amsoil ATF or Mobil1 ATF that are both full synthetic and have stronger additive packs and/or better base stocks to combat the remaining engine oil that is left over in the unit.

Which ATF are you planning to use for the fill?
 
I am not saying that I would do this today... but my 1980'ish Honda Civic called for 10W30 motor oil (as per manual) in the manual transmission. Today I have to put special CVT fluid in my Civic Hybrid. It is about $10. a litre! What a difference 25 years makes. I bet that transmission would still be alive and well today if the car had not rusted to pieces.
 
Originally Posted By: cb450sc
I am not saying that I would do this today... but my 1980'ish Honda Civic called for 10W30 motor oil (as per manual) in the manual transmission. Today I have to put special CVT fluid in my Civic Hybrid. It is about $10. a litre! What a difference 25 years makes. I bet that transmission would still be alive and well today if the car had not rusted to pieces.


Yes, some transmissions use motor oil but not the transmission in question. Different standards, materials and clutch packs are used.

If you put Dexron III or even Honda Z1 in your Hybrid Civic transmission, the transmission will probably die due to the lack of CVT fluid.
 
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Problem with engine oils is the friction modifiers.

If it was an HDEO that had an Allison C4 spec, then I'd say no harm done, get to it when you can. But if it was a GF-3/4 or something like that, I'd get it out ASAP.
 
Power flush, fluid exchange, transmission flush are all the same thing. They continuously push new fluid in while the old fluid is being pumped out. The fluid isn't forced in, your transmission's pump does all of the work. There's no reason to fear this service. 1.5x your transmission's capacity is all that is needed to replace all of the fluid. For your car, that would be about 12 quarts.

I'm not sure what motor oil will do to the friction material in your transmission. Best thing to do is to flush it with the correct fluid immediately. The clock isn't on your side either, as the friction material is soaking in this oil as we speak.
 
Do a cooler line flush yourself after a drain and refill of the pan. Its easier than you think and will get almost all of the old ATF (and engine oil) out. Go through all the gears while the engine is running for 10 seconds a gear range.

I would refill with Amsoil, but if thats not in your budget, or you do not feel its justified, then go with something from Walmart.
 
Penzoil. I used did it yesterday. The fluid coming out was red just like the fluid coming in. I was trying to find a location to drain the fluid out of the torque converter but couldn't find it. They should have made it so it is doable.

I should have changed my oil too while I was at it but decided to only change the oil filter since I only had roughly 2000 miles on the current residing Havoline synthetic I bought on sale from Big Lot.

I will wait for another 2k miles and change both oil and atf.
 
When I change my Amsoil out at 50K it looks brand new coming out. When I used the dealer stuff it looked like motor oil coming out... I use AMSOIL with confidence now!
 
Originally Posted By: StevieC
When I change my Amsoil out at 50K it looks brand new coming out. When I used the dealer stuff it looked like motor oil coming out... I use AMSOIL with confidence now!


That was my experience with Honda dealership changing my fluid at 30k miles, the fluid coming out at 70k miles looked like motor oil.
 
I found out that the Hyundai was only a semi-synth, and the Amsoil is 100% synth and designed for extended use... Either way I feel better about "new" looking oil coming out. Especially because my transmission doesn't have a user serviceable filter!
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