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 What to do with leftover fuel...		  New Topic  Topic Locked
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Don B
Captain

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USA
317 Posts
Initially Posted - 06/05/2007 :  11:01:09  Show Profile
Since I'm changing over to a 4 cycle outboard, I've found that I have about 5 gallons of fuel left over from my 2 cycle.

Any opinions on utilizing the leftover fuel in my lawnmower or car? Ratios?

Thanks for your help.
Don B
86FK/SR #5216 "Mighty M"
Southwest Florida
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Ed Cassidy
Captain

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USA
365 Posts
Response Posted - 06/05/2007 :  11:09:09  Show Profile
It wouldn't hurt a thing to put it in the car's gas tank. The oil is designed to be nearly smoke free anyway, so you likely won't even notice it. Some people actually swear by putting an additive like marvel mystery oil in their tank every few thousand miles.
Ed (Certified mechanic in a past life)
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tinob
Master Marine Consultant

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USA
1883 Posts
Response Posted - 06/05/2007 :  13:13:06  Show Profile
Ed/Don,

That was all well and good then came along catalytic converters and such...the SAE folks have since discouraged such practices. I use surplus two stroke fuel in other two stroke engines, weed wackers, chain saws, etc...made the mistake of putting some two stroke fuel in a B&S push type lawn mower and it neer had a heart attack. Don't know why, got away doing so in times gone by BUT,..like the fellow said, "the times they are a changing". Bought a new weed wacker recently and the manual said under a caution icon, "DO NOT USE OUTBOARD MOTOR OILS. Yeah sure use our oils only, and then what ?

My four stroke mower finally,(this year) has recovered from its two stroke "dose of salts". Figureds it was a cheep mower used as an edger how bad could it be...real bad

Think I'll not experiment with a $30,000 car's intake.

WHEWWWWWWWWW!

Val on Calista, #3936, Patchogue. N.Y.
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Ed Cassidy
Captain

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USA
365 Posts
Response Posted - 06/05/2007 :  13:46:02  Show Profile
Val,
I haven't been posting here long enough to have a reputation yet, so I fully understand your response, but I would never provide advice that was experimental. I refrained from suggesting using the 2-stroke fuel in a small engine because of the probability of messing up a spark plug using up 5 gals of premix gas but it will cause no harm to the catalytic converter of an automobile. There is no more oil being burned than what is acceptable by most manufacturers and it is designed to be burnt in a combustion chamber. My Isuzu was using 3 quarts of oil in 3000 miles and it was deemed acceptable by GM. The calculation works out to around a 60 to 1 gas/oil mix and it has been that way for over 100,000 miles without harm to convertors or O2 sensors.
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ddlyle
Captain

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302 Posts
Response Posted - 06/05/2007 :  14:43:08  Show Profile  Visit ddlyle's Homepage
For years I have used my leftover fuel (premix or not) in my Nissan pickup. (4 cylinder, 1990 model, over 260,000 miles on original engine). Some of the fuel I've "recycled" has been sitting around for over a year.
I just wait until I need to fill-up the tank, pour in the left-over fuel and top it off with fresh gas. I figure by waiting until my tank is nearly empty that I will dilute it with more and fresher gas.
Never a hiccup or complaint.
Sure beats pouring it overboard!
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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts
Response Posted - 06/05/2007 :  14:58:39  Show Profile  Visit Frank Hopper's Homepage
I used a batch in a bucket to clean a set of old winches, after I was done I just poured it out at my curb. It stained the concrete a little but I haven't noticed any ants.
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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts
Response Posted - 06/05/2007 :  17:13:47  Show Profile
<font size="6">YOU SHOULD NEVER POUR GASOLINE INTO YOUR RAIN CURB! </font id="size6">

That's what your neighbors rain curbs are for!
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atgep
Master Marine Consultant

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1009 Posts
Response Posted - 06/05/2007 :  17:50:31  Show Profile
<font color="red"><b>That is like dumping it into the lake to kill weeds</b></font id="red">. Just give it to a stinkpotter.
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atgep
Master Marine Consultant

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1009 Posts
Response Posted - 06/05/2007 :  17:51:55  Show Profile
Or use a gallon or so per tank for the next month in your car. The oil-gas ratio would be somethink like 1000-1. It will be fine.
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OLarryR
Master Marine Consultant

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USA
3467 Posts
Response Posted - 06/06/2007 :  05:37:04  Show Profile  Visit OLarryR's Homepage
I have to admit that many, many years ago, i would use old oil around part of the baseline of the house figuring it would kill/prevent insects, etc from entering the house. I mended my ways a long time ago.

My thought is that based on perhaps not taking a chance with using gas with 2 stroke oil that has been laying around in 4 stroke engines and no other 2-stroke combustion equipment to use it in, i would for peace of mind check into your community's recycle programs. many have areas where you can dump toxic liquids and/or oil into drums located on their recycle and waste removal facilities. many do not charge for this service unless you had massive quantities of waste to get rid of or were a commercial entity.

This is now the way to go for those that change their car's motor oil and do not know what to do with the old oil. Some bring old oil to gas stations that do car service and will take it but some/many may charge a fee for taking it in. But the county waste site in my area will take oil and believe other toxic fluids. You have to check...with your county. they probably have a website that indicates what they will take and what they will not.
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existentialsailor
Master Marine Consultant

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USA
1180 Posts
Response Posted - 06/06/2007 :  06:06:11  Show Profile
I burn it in my truck, but it's a flex fuel engine and basically will run on anything.
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Oscar
Master Marine Consultant

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USA
2030 Posts
Response Posted - 06/06/2007 :  07:28:43  Show Profile  Visit Oscar's Homepage
Liquids I can't burn, like used brush cleaner etc, go into a plastic cement tub filled with kitty litter. The litter absorbs the liquid, then I place it outside in the sun where it slowly dries up.....

When it's dry again the tub sits under Mr. Toad (my '62 Land Rover) to absorb some of its "seepage".
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stampeder
Master Marine Consultant

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1608 Posts
Response Posted - 06/07/2007 :  22:03:55  Show Profile
I drain and clean my gas tank at the end of the season.
I took 2 gallons of old gas to my local fire station where they accept unwanted fluids that cannot be dumped down the drain.
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jerlim
Master Marine Consultant

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USA
1484 Posts
Response Posted - 06/08/2007 :  01:41:28  Show Profile
I just put some into the empty tank of my 6 cyclinder toyota, each time it ran low , and then filled 'er up - never a problem.
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tinob
Master Marine Consultant

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USA
1883 Posts
Response Posted - 06/08/2007 :  13:02:56  Show Profile
Oscar,

What effect does the evaporating fuel have on the environment? And does it wag it's tongue at attempts to deminish poluting the athmosphere?

Val on Calista, # 3936, Patchogue, N.Y/
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John Russell
Master Marine Consultant

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USA
3444 Posts
Response Posted - 06/08/2007 :  13:12:59  Show Profile
Good question Val. I would imagine it would be less polluting than combusting the same materials since many of the hydrocarbons, etc. would remain in the litter and not enter the atmosphere. The disposal of the litter, on the other hand may be more of an issue due to the relative concentration.
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dmpilc
Master Marine Consultant

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USA
4593 Posts
Response Posted - 06/08/2007 :  14:25:47  Show Profile
I've poured it into my car's gas tank when I fill it up. I wouldn't pour in all 5 gallons at once, however. Maybe 1-2 gallons at a time. The fillup will dilute it considerably.
David
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.