Anyone use it for that? Any benefit you have noticed? I figure it won't "hurt" anything, because they say it can be done, but anyone use it for that and felt like it improved something? i.e. - ~fixed small surging problem, or... ~other fuel delivery issue, saved a repair... ~freed up 50 extra HP...whatever? : ) I was going to use it on a late 1990s injected car for someone...get some more life out of it. If there was great cleaning effect. It seems to de-sludge engine lifters, etc. from what I have always heard, but it seems THIN. But for gas? Any harm to any sensors or things on more modern, "fragile" cars?
I mean use Seafoam. Its also an additive and fuel treatment. If you are doing a fuel injected car, put half the bottle in the gas tank and the other half in the vacuum line from the brake booster to the intake manifold. This will clean out all the carbon and make a bad ass smoke show for you to make your neighbors mad with. I live and die by Seafoam. I also use MMO, but usually only in my crankcase anymore.
I've used it in the tank on my Ford 8N. That thing sits and sits...hardly ever run it. I have had an exhaust valve try to stick open on the thing a couple of times. I pull the plug out, squirt some MMO down the hole, let it sit a bit, then tap the valve down (may have to do it two or three times), put the plug back in it, crank it and go. It has always freed-up a sticky valve for me. Guess the right thing to do, one of these days, would be to pull the valves and clean them and the guides. DD
THIS OLD STUFF HERE?: http://www.seafoamsales.com/motor-treatment.html I did not know that was stilla round. Does say, "it won't harm seals, gaskets, CATALYTIC CONVERTERS, or O2 Sensors" ...cool. What's it do? Have a detergent quality, or...? THANKS. RE: MARVEL...anyone else with a "using it in gas improved ______" story? THANKS.
My lawn mower wouldnt start....put MMO in the gas tank, second pull and it fired...after that, I put a splash in my gas tank in the '34 once in a while....
I use it every tanks full with my model T Fords. Cures a couple issues. The Ts when modified with high flow intake ( aluminum) and some added compression will actually freeze up at the carb throat when ran at night at above average speeds 45-55 mph. Causing them to spit like a fuel starve. Ice will form on intake. A shot of marvel gets rid of that issue added to the gas.
Wow thanks guys. Aside from unsticking engines (there are stornger penetrating oils,. though), I have heard of museums using itin the cylinders whe a car's going to be sitting a long time. I just wondered how muych to out in a "modern car". It soesn't say "X" amt. is too much on the label. 17 gal tank...we'lltry some "trials".
I was asking my engine machine shop if he thought it would be worth putting hardend seats in a set of Y-block heads I traded for, I hated to since the heads were freshly rebuilt but they didn't do the harded seats. He said no, just pour a little Marvel in the tank when I gas up and they'll be fine. Guess I'll try it.
with the eathonal i use 1 1/4 oz synthetic outbord oil to 5 gallons of gas converts are plugging with aluminum this stays mixed have 5.4 expedition got 21.7 on the road after 10% eathonal i got 16.8 using oil in gas i get 20.1 now it helps my tt truck makes big diffrence on how it runs
Shouldnt be used in anything OBD II with catalic convertors (96 and newer) Will ruin the convertors and harm the oxygen sensors !!! Would be a very expensive experiment!!!
That's kind of what I was wondering. I am going to use it for carbureted (I'd call, less "fragile") cars. One person mentionin the O2 sensors, etc.. Is enough. It's late 1990s so I thought I'd try to get rid of gunk. But I will just do the oil. THANKS for the responses. I'll remember the advice from all, just won't risjk it in this thing. ======
MMO is a great 'top end' oil and can be used in the fuel, but not with cats. I used to know an old GM master mechanic, whenever I went to visit, he would be building someone's motor. I noticed that he used to soak the main bearings in MMO, overnight. He told me it had eucalyptus oil in it and it would actually penetrate the bearing material and make them last much longer. This old guy worked for Pontiac for over 38 years. I have been doing it ever since. Has anybody ever heard of this? I just took him at his word, all these years. (You could do that back then)
On the topic of MMO in the gas tank. I have a 4.3 Chevy that will come up with a "miss" a couple times a year. Put in a pint of MMO with a full tank of gas and it is cured each time. Have never used it in the crankcase except for airplane engine. Put a quart of MMO in the airplane engine for additional lube before getting ready for mothballing long periods. Seems to keep the crankcase clean. Just my 2 cents....
i have been using Synthetic out bord oin in my gas since they went mandatory eythonall here in FL after talking with my fuel rep from Shell. along with eythonall they removed the top end lube this makes the pistons a little draggy in the bore after a muffler clinick with a state run class i found out that cats were plugging with aluminum i had lost my 22.7 mpg went to 16.8 i manualy check every tank i started running 1 1/4oz or Synthetic outbord oil to 5 gallons of gasand milage came back to 20.1 this i have been doing for 2 years on 99 5.4 Eapedition and a 91 chevy 3500 dually wreckerthat weighs 8200lbs that one went from 10.6 to 6.3 and wiyh oil it pulls better and and back to 10.1 i have pulled the sensors out and they look like there is no build up
When I first got my 48 Chevrolet the 235 in it smoked....alot.My brother suggested to use some MMO.After a few start ups and letting it run for a while each time...no more smoke.Put it in the tank and topped the oil off with it.
I like the smell. I had a brother that DRANK some as a kid, he picked up the can and took a slug. The poison control phone number was always right next to the phone at my house. I use it at home when I change light bulbs, it keeps the similar metals from galling. I keep a small squeeze bottle of it under my sink. We used to use it to soak rusty bicycle chains, and for all sorts of bike assembly. I used to see the old timers add it to their gas. I've had good luck adding a pint to the oil to free up sticky valves. Bob
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