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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 09-24-2010, 02:59 AM   #1 (permalink)
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Marvel mystery oil

Anyone ever added this to your motor oil to try and quiet things down? Not sure if it's a good idea or not or what it would do just kinda curious.
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Old 09-24-2010, 08:14 AM   #2 (permalink)
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While Marvel Mystery Oil is a good product, I don't think adding it to the engine oil will quiet it down any. If you have something knocking or tapping from blockage in an oil galley then the MMO is only a band-aid. It may loosen heavy deposits up, but synthetic oils will also do that or time. This is why some claim their engines leak after switching to synthetics.

Adding MMO to the fuel might be something that can help add a bit of lubricity to the fuel, similar to guys running ATF with their fuel.
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Old 09-24-2010, 08:42 AM   #3 (permalink)
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While Marvel
Adding MMO to the fuel might be something that can help add a bit of lubricity to the fuel, similar to guys running ATF with their fuel.
I had to flush the ATF because the mechanic added the wrong one. So, instead of disposing of it at a municipal site, I can add it safely in small quantities to the diesel fluel?

Would you do it?

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Old 09-24-2010, 08:56 AM   #4 (permalink)
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I had to flush the ATF because the mechanic added the wrong one. So, instead of disposing of it at a municipal site, I can add it safely in small quantities to the diesel fluel?

Would you do it?

Petanqueur99
Some do it. I don't.

I don't see harm in small amounts, but the actual amount per fill-up is not something I have looked into. I know from reading the forum's some try it, to help add lubricity to the fuel for the injectors.

I personally wouldn't use any fluid that had been in a transmission before. You could be adding particulates to the fuel that would go through the pump and then to the fuel bowl where it is hopefully caught in the filter. Not a risk I would take for the little bit of value it may add.
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Old 09-24-2010, 09:39 AM   #5 (permalink)
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I have heard of some people adding two stroke oil to the fuel with good results.
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Old 09-24-2010, 11:13 AM   #6 (permalink)
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Some do it. I don't.

Not a risk I would take for the little bit of value it may add.
That's good enough for me! Tks

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Old 09-24-2010, 08:44 PM   #7 (permalink)
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two stroke oil works great, I've been using it every tank for about 2 months now. I noticed how quiet it got immediately! I meen a real difference. My mileage went up 49km per tank!!!! I'm getting just over 500 miles a tank now, I used to get about 460! I was scheptical, but not now. works great
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Old 09-24-2010, 10:27 PM   #8 (permalink)
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I have been running the 2 stroke oil for about 6 months now havnt really noticed a difference I use an 1oz per gallon
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Old 09-25-2010, 08:28 AM   #9 (permalink)
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I put 1 litre in per tank, which is about 140L, Soooo, not sure the break down on that, dont have time to do the math. Sure works for my truck. If I miss one tank, I immediately hear more noise. Its real smooth on 2 stroke. I've heard others didn't notice either, but I sure did. I see you have alot of performance stuff on your truck, mines stock except for filter and programmer. So maybe all that stuff makes it too noisy to tell the difference. I know my buddies truck is super performance, and you cant even hear my truck next to it.
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