You mean you too were once young and stupid? I guess we were the only ones around here.
Accidentally Added Hydraulic Oil to Car
- Thread starter acbackflow
- Start date
I was just stupid. I skipped the young part. Haha hahaha
Years or decades ago my brother and Dad drained the transmission of my brothers car thinking it was the engine. And added 5 QT of oil to the engine.
I am thinking my Dad was minimally involved as he would have picked up the color and viscosity of the drained lubricant. As would I have.
It was caught someway as nothing was damaged.
I am thinking my Dad was minimally involved as he would have picked up the color and viscosity of the drained lubricant. As would I have.
It was caught someway as nothing was damaged.
Should be O,K, if it was paraffinic or Polyol Ester. Oil is better than NO OIL and better than MMO or Valve Medic or Lucas Oil Stabilizer
To many paranoid nervous nellies around here, LOL.
To many paranoid nervous nellies around here, LOL.
- Joined
- Oct 31, 2025
- Messages
- 138
Granted, we all have to start acquiring knowledge and wisdom at some point (hopefully). Sadly, this is a classic case of when Naivety dies on the cold hard slab real life. May thy engine rest in peace.
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My truck was losing a quart of oil every 75 miles for a while. It was bad enough that I would put a metal pan under it when I was parking in parking lots or someone's driveway. The smoke trail following me everywhere was nuts!
It would drip directly on the exhaust Y pipe (which somehow still managed to rust out).
I was genuinely worried the truck would catch on fire so I finally fixed it.
I assume you mean Amsoil
Space shuttle oil for my cars... Only the best!
One of my favorite testimonials along with “tested by the military”.
I suggest cold pressed olive oil.
I put hydraulic fluid in engines all the time. I don't leave it in there for very long.
MolaKule
Staff member
I would change it out since the additive chemistries are not the same.
I had a 68 Chevy 1/2 ton short bed with a straight 292. That engine had a combo oil consumption problem.
Leaking, wore rings and had valve seals. I was young and didn't have excess cash for such things back then.
It got bad enough I was topping it off with spare 90W gear oil I had laying around.
I end up swapping it out for a 250, then a 307. Little did I know, the 307 had a hair line crack in one of the rod bolts.
I eventually found that out when the piston stayed in place and the crank rotated out of the rod cap. It was fine until the crank rotated back around and "met" back up with the piston rod.
The truck body was in good shape, so I sold it off for $400 and moved on with my life.
Two motor swaps in one vehicle was my limit.
I can resonate with that. This is the second engine in this truck. It still uses/leaks some oil but a lot more reasonable now.
But it has some piston slap and a weird valvetrain noise from the left side head on a cold start. It's tired. A previous owner overheated the daylights out of it and it was full of crusty sludge when I opened it up for the head job.
I keep looking at the rest of the truck and it's just not worth another engine. But given everything else and my own cheapness, I'll probably end up putting another engine in it at some point.
Change it....but send a sample out for analysis so we all can see. Who knows, you may have stumbled upon the next generation of Valvoline Restore and Protect+.
I too am held captive by my own cheapness sometimes. It's a hard thing to shake, since it helped get me where I am today.
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