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Added small amount of transmission fluid to the engine

Tiny
BETS777
  • MEMBER
  • 1998 BUICK LESABRE
  • 2.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
Yesterday I was topping off the oil and as I started to pour it looked a bit red. I stopped. I believe someone put transmission fluid in a bottle of that said oil. I would say I put in a 1/4 of a quart give or take. Likely less than that. I assume this will not cause any harm. Should I let it be or change it again?
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Thursday, May 12th, 2022 AT 4:24 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

Adding transmission fluid in oil reduces the effectiveness and efficiency of the engine oil. With having just, a 1/4 of a quart it likely be okay.
However, I would recommend changing out the oil and filter to be on the safe side.

Let me know of any questions.
Thank you.

https://www.2carpros.com/articles/how-to-change-engine-oil-and-filter
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Thursday, May 12th, 2022 AT 5:29 PM

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