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2 Stroke Oil and Shelf Life

09/21/2014 7:31 PM

CR4 - Thread: How Old is too Old for 2 Cycle Oil?

I just put a bottle of 3 YO 2 stroke in a new gas can with new gas.

The above thread indicates it's probably OK. Unsealed, in the original container in a very dry environment.

Any nay-sayers?

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#1

Re: 2 Stroke Oil and Shelf Life

09/21/2014 9:11 PM

What's it like millions of years old when you got it to begin with...

I would be worried if it was milky color, otherwise,,,,not....

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#2
In reply to #1

Re: 2 Stroke Oil and Shelf Life

09/21/2014 9:33 PM

Looked OK, smelled OK, tasted fine.

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#3

Re: 2 Stroke Oil and Shelf Life

09/21/2014 11:26 PM

Best if used before April 1, 2050; expires immediately thereafter.

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#4
In reply to #3

Re: 2 Stroke Oil and Shelf Life

09/21/2014 11:32 PM

I'm good.

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#5

Re: 2 Stroke Oil and Shelf Life

09/22/2014 9:13 AM

I would say fine- and I've used much older, pre-opened stuff.

The major problem with fuel is oxidation of gasoline, forming sticky varnish films via crosslinking (as well as evaporation of lighter fractions). That's why kerosene lasts much longer. Oils are made from higher carbon chains with lower rates of reaction, as well as much lower levels of unsaturation (double bonds are prone to oxidation/epoxidization). Far less oxidation and essentially no evaporation, unless there are some volatile additives.

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#9
In reply to #5

Re: 2 Stroke Oil and Shelf Life

09/22/2014 9:20 PM

I've used 2 stroke oil out of a previously opened container that must have been at least 25 years old. Found it buried in a box from a previous move. Worked just fine in my chain saw, weed wacker, leaf blower, etc. If I had a jet ski that required some special low ash super-duper expensive oil, I would probably be a bit more circumspect about it, but I've often wondered if Bombardier just says that you will kill that Rotax engine if you don't use their "special" oils to maintain an income stream.

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#6

Re: 2 Stroke Oil and Shelf Life

09/22/2014 9:19 AM

Could have been setting on the shelf at the store you bought it from that long.

It's not that it has an expiration date like milk.

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#7
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Re: 2 Stroke Oil and Shelf Life

09/22/2014 10:14 AM

Milk has an expiration date? I thought they just moved it down the aisle to sour cream.

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#8

Re: 2 Stroke Oil and Shelf Life

09/22/2014 4:37 PM

I had a 50 year old can of Hudsonite Clutch oil from when Hudson's used an oil bath clutch. It worked ok in a Villiers 200 clutch on an old Greeves bike. It was smooooth!

I gotta go take a nap now.....

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#10

Re: 2 Stroke Oil and Shelf Life

09/22/2014 9:36 PM

The die is cast. The oil is mixed.

It's in the tank and in use. As soon as I can find that 15 YO and get him motivated.

Thanks for indulging me.

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#11

Re: 2 Stroke Oil and Shelf Life

09/23/2014 7:05 AM

As long as it tastes fine, you should be good.

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#13
In reply to #11

Re: 2 Stroke Oil and Shelf Life

09/23/2014 9:20 AM

Same thing the doctor told the nurse when she asked:

"Is this an oral or rectal thermometer?"

(With my apologies to Dr Killum).

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#12

Re: 2 Stroke Oil and Shelf Life

09/23/2014 9:16 AM

I have noticed some very fine drop out deposits in even the best high quality oil if left in storage for a long time.

This occurred in unopened bottles,so I guess it is possible for additives to drop out over time.

I have also read somewhere that thermal cycling,even the relatively minor deviation

from winter to summer in a storage building can tend to "wax-ify" certain

hydrocarbons in motor oil.

Look in the bottom of the bottle next time you do an oil change,and you will see a

small amount of slightly cloudy drop out,like a little flour in the oil.

I don't have any scientific proof of this,only empirical evidence from my own experience.

I have tried several different brands.

I would be curious to know anyone else's results.

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#14
In reply to #12

Re: 2 Stroke Oil and Shelf Life

09/23/2014 8:05 PM

A lot of motor oil vendors use black plastic for the containers so you don't see that suspended gunk. I noticed the same thing in the Rotella oil for my diesel. It looked like brown dust at the bottom of the one gallon containers which were white.

I don't think I would worry about the suspended 'stuff'.

Since I have been using nothing but the highest quality Sam's Club 10W-40 no-name dino oil in my '02 Chevy Suburban for the last twelve years. We've logged about 212,000 miles with about half of that towing a 32 foot travel trailer, sometimes punishing that little 5.3L Vortec within an inch of its life over high mountain passes. Burns about 1/2 quart of oil every 5,000 miles.

The oils today, even the cheap crap, are absolutely amazing. They have the same API certification as the name brand oils that cost twice as much.

Of course we could get into the dino vs. synthetic discussion, but I believe engine life has a lot more to do with changing the oil prudently than the type of oil. I generally use 5,000 mile intervals because it is easy for me to remember by looking at the odometer. Certain severe applications (turbo, racing, towing, extreme heat/cold, etc.) might make a good reason to use synthetic, but for the majority of us, a properly rated API dino oil works just fine for the majority of drivers.

Cheers !

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#15
In reply to #14

Re: 2 Stroke Oil and Shelf Life

09/23/2014 8:23 PM
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#16
In reply to #15

Re: 2 Stroke Oil and Shelf Life

09/23/2014 11:58 PM

Interesting link. Thanks!

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#17

Re: 2 Stroke Oil and Shelf Life

09/24/2014 8:59 AM

For all that may be interested,here is a link to a very informative site on motor oil in general,as well as other lubricants.

http://www.bobistheoilguy.com/motor-oil-101/

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#18

Re: 2 Stroke Oil and Shelf Life

09/24/2014 9:32 AM

Huskies used Crisco (the motorcycle, not the dog).

Two stroke dirt bikes used castor oil which can cause racing runs.

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