# ATF in motor oil **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** gmc, 2500\ **Created:** [March 27, 2018, 9:04pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534 "2018-03-27T21:04:19Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![James\_Jensen](https://avatars.discourse-cdn.com/v4/letter/j/aca169/32.png) [@James\_Jensen](https://community.cartalk.com/u/James_Jensen)\ **Post date:** [March 27, 2018, 9:04pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/1 "2018-03-27T21:04:19Z")
Accidentally added about 4 tblsp to my motor oil , and I’m concerned if I should be able to run it or to have it sit till oil change ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [March 27, 2018, 9:09pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/2 "2018-03-27T21:09:36Z")
That tiny amount should have no affect. But are you sure that’s how much you added? ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [March 27, 2018, 9:10pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/3 "2018-03-27T21:10:05Z")
This will not be at all problematic. All that you have done is to add an **extremely** miniscule amount of 10-weight oil to your engine’s crankcase. Simply drive on–with confidence–until your next scheduled oil change. Of course, you will still need to check your dipstick periodically until then… ---
**Author:** ![James\_Jensen](https://avatars.discourse-cdn.com/v4/letter/j/aca169/32.png) [@James\_Jensen](https://community.cartalk.com/u/James_Jensen)\ **Post date:** [March 27, 2018, 9:10pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/4 "2018-03-27T21:10:35Z")
I poured a bit and noticed it was ATF and stopped so I would think it was only a little ---
**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\ **Post date:** [March 27, 2018, 9:11pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/5 "2018-03-27T21:11:31Z")
Four tablespoons is 2 ounces or 1/16 of a quart. Drive on! ---
**Author:** ![James\_Jensen](https://avatars.discourse-cdn.com/v4/letter/j/aca169/32.png) [@James\_Jensen](https://community.cartalk.com/u/James_Jensen)\ **Post date:** [March 27, 2018, 9:12pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/6 "2018-03-27T21:12:22Z")
Sweet thanks ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [March 27, 2018, 9:30pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/7 "2018-03-27T21:30:17Z")
As others said there is.no problem. myself and many others have for years replaced 1 quart of oil with ATF for various reasons and I have ever seen or heard of a problem resulting after hundreds of thousands of miles. ---
**Author:** ![Docnick](https://avatars.discourse-cdn.com/v4/letter/d/ecae2f/32.png) [@Docnick](https://community.cartalk.com/u/Docnick)\ **Post date:** [March 27, 2018, 10:08pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/8 "2018-03-27T22:08:54Z")
ATF is a high quality, thin lubricating oil. Although it does not have all the additives of motor oil, it is harmless in small amounts. ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [March 27, 2018, 11:33pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/9 "2018-03-27T23:33:45Z")
I have to ask… How the heck did you add 4 tablespoons of ATF to your oil??? I’m not criticizing, but that’s an unusual enough thing to have piqued my curiosity. I have an enquiring mind. ---
**Author:** ![James\_Jensen](https://avatars.discourse-cdn.com/v4/letter/j/aca169/32.png) [@James\_Jensen](https://community.cartalk.com/u/James_Jensen)\ **Post date:** [March 28, 2018, 12:28am UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/10 "2018-03-28T00:28:48Z")
You know when your half asleep and you check your oil yeah I grabbed wrong one ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [March 28, 2018, 1:51am UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/11 "2018-03-28T01:51:56Z")
Keep the oil topped off at the full mark on the dipstick until the next oil/filter change. Should be ok. ---
**Author:** ![oldtimer-11](https://avatars.discourse-cdn.com/v4/letter/o/e79b87/32.png) [@oldtimer-11](https://community.cartalk.com/u/oldtimer-11)\ **Post date:** [March 28, 2018, 2:44am UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/12 "2018-03-28T02:44:41Z")
Back in the 60s I knew two guys that always added a quart of transmission fluid when changing their oil to keep the rings and lifters free. Since both of these guys lived lives that were always “a day late and a dollar short” , no one paid any attention to their advice. ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [March 28, 2018, 2:02pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/13 "2018-03-28T14:02:55Z")
By the way… **Welcome back, mountainbike.** We have missed you for the past couple of weeks! 🙂 ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [March 28, 2018, 2:05pm UTC](https://community.cartalk.com/t/atf-in-motor-oil/114534/14 "2018-03-28T14:05:00Z")
> [@VDCdriver](#): > > By the way… > > Welcome back, mountainbike. > > We have missed you for the past couple of weeks! Sincere thanks. 🙂