3 years old opened 5L jug of Castrol Syntec

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21
Location
Ottawa, ON
Hello! I just recently moved and I found an old 5L opened jug of Castrol Syntec, I remember I was filling that one with all the leftovers from my oil changes (which was all Castrol Syn), but then the jug got full, sold the car and totally forgot about it. It is approximately 2-3 years old. Do you think the oil is still good; can I use it on my new car?
 
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1,271
Location
Dallas Texas
Originally Posted By: Nek167
Hello! I just recently moved and I found an old 5L opened jug of Castrol Syntec, I remember I was filling that one with all the leftovers from my oil changes (which was all Castrol Syn), but then the jug got full, sold the car and totally forgot about it. It is approximately 2-3 years old. Do you think the oil is still good; can I use it on my new car?
Yes. Just dont get any leaves in it when you open the bottle outside. That is the worst that could happen. smile its not like that oil "expires." Its not Tropicana orange juice from concentrate You DONT need to shake it you DONT need to do a rain dance around it You DONT need to put stuff in it You DONT need to hold it upside down...... If it is still liquid, it is ok Pour in Top up Close hole Drive. There isnt any special consideration, as long as the bottle isnt leaking from being around so long as i have seen some old 10qt jugs of Rotella T 15W-40 doing at Wally World. HTH.
 

Nek167

Thread starter
Messages
21
Location
Ottawa, ON
Ok thank guys. I have heard about moisture accumulation and was kind of septic, wondering if it could even contaminate the oil in a plastic jug.
 
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40,838
Location
Great Lakes
Originally Posted By: Kuato
Any moisture will burn off the first time you get the oil nice and hot....
No doubt about that. The question is: what kind of permanent damage (think add pack depletion/acid formation) has the moisture done to the oil during those 3 years during which it was just sitting on the shelf? Possibly I'm being overly cautious here. It may just be fine. After all, I'm assuming the bottle had a cap on it and wasn't just left open.
 
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2,370
Location
Texas
Moisture? How would it have gotten moisture in it if it wasn't run in an engine or left outside in the rain? Motor oil is NOT hydrotropic like brake fluid, which means that it doesn't suck moisture from the air like brake fluid does. NEVER use old brake fluid, but as long as it is clean go ahead and use that motor oil with confidence!
 
Messages
1,271
Location
Dallas Texas
Originally Posted By: Nek167
Ok thank guys. I have heard about moisture accumulation and was kind of septic, wondering if it could even contaminate the oil in a plastic jug.
Not really, if that foil isnt broke aint no moisture. I too used to wonder if it could "evaporate out through the foil" but if there are NO leaks then, no, that cant happen. Particuarly not with motor oil, sitting somewhere. smile Quarts feel lighter when hot (like in the trunk of a car in the summer) because its hotter in the quart and feels lighter. Same amount of oil in it.
 
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2,995
Location
Cedarbrae, Ontario
Originally Posted By: wag123
Moisture? How would it have gotten moisture in it if it wasn't run in an engine or left outside in the rain? Motor oil is NOT hydrotropic like brake fluid, which means that it doesn't suck moisture from the air like brake fluid does. NEVER use old brake fluid, but as long as it is clean go ahead and use that motor oil with confidence!
I think the term you mean is "hygroscopic"
 
Messages
2,370
Location
Texas
Originally Posted By: xxch4osxx
Originally Posted By: wag123
Moisture? How would it have gotten moisture in it if it wasn't run in an engine or left outside in the rain? Motor oil is NOT hydrotropic like brake fluid, which means that it doesn't suck moisture from the air like brake fluid does. NEVER use old brake fluid, but as long as it is clean go ahead and use that motor oil with confidence!
I think the term you mean is "hygroscopic"
You know what I mean smile Motor oil is not "hygroscopic".
 
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11,656
Location
NorthEast
Your title gave me entirely different picture. I was hoping you were going to tell about your cute 3 year old opening the jug and making a big mess.
 
Messages
1
Location
Texas
Unless the bottle is 50/50 oil/water then you have nothing to worry about. I used to save up unused oil and pour them in a year later. It add up.
 
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