Where can buy this MM oil?

My Grandfather and most of the old timers I talk to swear by this stuff. My grandfather adds 32oz to each tank everytime he fills the boat. Not a very concentrated mix because each tank holds 125 gallons. The people I talk to add it to everything, they also use it in the engine oil. It seems to work to, a lot of people have had good results with it.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

You can get it at most any auto store.....like Autozone....or Pep Boys...and so on. I pay 2.99 for a 32oz bottle.

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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

In my VW's I ran a combo of power service winter and ATF for ages, till someone convinced me ther are additives in ATF now that are not so hot for the injection pump. ATF was good stuff in the tank, and filling the filter on changes.
MMO is probibly just as good. Practicaly anything to increase the lubricity of the fuel is a Good Thing as long as it's pure and leaves no funky deposits.
I have many gallons in steel cans of MMO that are god only knows how old at the shop that were given to me years ago. Probibly antiques..

Hey Will, put some on your rear end and see if it sits any higher.

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One more Radar Lover gone...
1982 VW Caddy diesel 406K 1.9L AAZ
1994 E320 195K

I believe that I can honestly say that I have never been in an auto parts store in the United States where Marvel Mystery Oil was not on sale.

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Alan the Radio Guy
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Amateur Radio Station N7CEU
1985 300CD 199,000 and still rolling

in my truck, with the 7.3 liter IDI Navistar turbo engine, using either the PS diesel additive or the lucas additive nets a reduction in the high pressure injection pump noise. Try it, put additive in at the gas station, use earplugs, and after about 2 minutes, the pump gets quieter.

MM oil does the same thing. I use the shotgun approach: I rotate.

I can't tell if there is a difference in fuel mileage or power.

ATF work too, but I've always used it when I'm running dyed fuel. Truck seems off on power with ATF (1 quart/15 gal) in the tank. Like running a 2-stroke.

Red fuel is something like a 10,000 dollar fine. ATF could be a decent defense.

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1986 300e 5-speed 223k
1995 Volvo 850 T5 wagon 65k
1985 F-350 475k

BusyBenz-True the Old Man didn't live 'til 100 but did make it to 90 and was still making Babies at 65 yrs. of Age--maybe it was his secret version of Viagra.(liquid form that is)

I'm going to bite. See how it tastes.

I will try running it in my tank and see if it makes my 300SDL ultra-smooth. My car is already relatively quiet, but it is not as quiet as I feel it should be: No combustion noise should be heard at all. Just a slightly muted purr.

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1987 300SDL (324000)

1986 Porsche 951 (944 Turbo) (166000)

1978 Porsche 924 (99000)

1996 Nissan Pathfinder R50 (201000)

I added a quart to my fuel tank today, it killed the terrible odor from this mornings fuel.
Very odd, I seem to get a foul smelling batch of fuel every few months.
Nice blue color, normal odor filling tank, no power loss, just bad smell.
Here is the thread.
bad smelling fuel, Gag, gasp, choke

Maybe there's more about this Mystery oil stuff we're not being told about, dag nabit, maybe those little green men buzzing around our planet know what the Mystery is, and aren't gonna tell us!


Well, I tried the stuff in my 87 300D and oh boy, now it's too quiet! Got to have a little rythm, you know? Also seems like it has more power, but that's probably just in my head! Does it raise Cetane levels?? BB

I added about 5 ounces to a 3/4 full tank of diesel, didn't really deaden any noise or anything, at least i hope it helps lubricate things. You can add it to the engine oil right?

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1985 CA 300D Turbo , 213K mi

How about a Jack and Mystery Oil, or maybe a shot with MMO back, or how about filling up the washing machine and doing the rags from the garage?

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'99 S420 - Mommies
'72 280SE 4.5 - looking to breathe life into it
'84 300SD Grey - Sold
'85 300SD Silver - Sold
'78 Ski Nautique

The stuff smells great, too.

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1982 300SD

I will get ya for that one. Saw a 350 sdl back home that has the same low rear end. Must be a common problem. Hers was worse than mine.

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1982 300SD Light Blue
2002 Honda Accord SE
1974 Toro Wheel Horse Tractor
2000 Toyota Tundra Pickup

A 350sdl is about a decade younger than your car too, odd..

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One more Radar Lover gone...
1982 VW Caddy diesel 406K 1.9L AAZ
1994 E320 195K