tolsen

Old synthetic oil

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I’ve been tidying up a wee bit and found in my shed six litres of synthetic oil from 1984. At that time synthetic oil was rather expensive and I only used this oil for winter. Drained it early May and replaced with standard mineral oil. I wonder if this old oil now is still safe to use. 

From memory this oil only saw limited service perhaps less than 1500 km in the OM314 engine of my MB 508D camper van from late October to early May. The Smart is now due an oil change and I wonder if I can use this old oil. Look forward to your opinions and advice folks. 

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Hmmm...????

 

Oil the engine's life's blood.......oil is cheap compared to the damages bad oil could do...no..?

I'd be using it on your chain saw or lathe or drill press, personally not in my engine.....but that's just me...lol

 

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This oil cost me an arm and a leg nearly 40 years ago so I wish to make good use of it. Just concluded it is semi synthetic by reading the faded print on its plastic container. 

Think it will find good use in my 1963 lawn mower. Bought today 4 litres of MB 229.51 spec 5w40 oil for only £10.  Low SAPS grade. That is what I use in my 2 stroke outboards instead of the costly special dyed 2 stroke oils. Should be fine for the wee Smart. 

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I am kinda OCD about oil.  I buy 4 quarts of Mobile 1 0W40 for each oil change.  There is always a small amount left in one bottle, but I don't use it for the next oil change.  I always start with 4 new quarts and a new Mobile 1 M 108 filter.  I may be crazy, but for me, I just feel like I am treating my car right.

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I do not drive my car a lot, 5081 miles in just over 10 years.  I still change it once a year.  This May when it was due, I realized I had only driven 91 miles in the last year due to some illness I have been having.

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10 minutes ago, 1983JZR3W said:

I do not drive my car a lot, 5081 miles in just over 10 years.  I still change it once a year.  This May when it was due, I realized I had only driven 91 miles in the last year due to some illness I have been having.

Christ I drive that much in a couple of months...lol.     I too use a new jug every change but save the extra and make up enough to use one day as a whole change.  I learned the hard way after breaking my back and couldn't bend over to change my oil, that it is an essential component not just some greasey mess that you kept filling up after it gets old and burnt up....I destroyed a good head in my Mazda 323 .......sometime i learn things the hard way and aren't shy saying so...lol.  I'm also too tight or cheap to pay someone to change my oil....something I still can't get past paying someone to turn a simple drain plug and a filter......augh!

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id buy new oil and save the old stuff for the wifes car

 

..or a customer

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5 hours ago, tolsen said:

Think it will find good use in my 1963 lawn mower

 

lawnmower should use non-detergent straight 30

 

 

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Posted (edited) · Report post

Provided it's the correct grade and has been stored in a sealed container I'd use it.

Edited by Chopper

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I think he said it had been used briefly in another engine.....

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Just now, MikeT said:

I think he said it had been used briefly in another engine.....

Yes, I used this oil in my first camper van for only a few winter months in 1984, 35 years ago.

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It'll make great fire starter...lol.

Mixed with some varsol and maybe a pinch of gasoline....great...!

 

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36 minutes ago, tolsen said:

Yes, I used this oil in my first camper van for only a few winter months in 1984, 35 years ago.

In which case I'd not be so worried about the oil itself, but the nature of any contaminants and the like, so no.

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I have tonnes of good used engine oil which I normally use as fuel.  I clean the oil in my diy centrifuge then mix maximum 50 50 with diesel. That is perhaps the best way to get my money back of this at the time rather expensive engine oil. 

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