1 quart MMO or 16 oz for first time cleaning ?

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MetalSlug

MetalSlug

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I'm about doing some internal engine cleaning process. Try auto rx few time in the pass and not happy. I'm thinking MMO since it work as I drive. My jeep 4.0 take 6.5 quart with over size filter. I'm thinking running 5.5 quart of T5 and 1 quart of mmo. Or should I just run 16oz and rest is oil. Will be 3k miles or 6 month oil change. Between 2 option what is best way for first time cleaning ? Thank you .
 
MMO recommends up to 20%, with 6.5 qt sump I would use a quart MMO. Just check your oil level every so often to make sure MMO doesn't burn off.
 
Well, the company says to use 20 to 25% of your total oil capacity, so 1 qt. would be fine. You didn't say how many miles you have on the vehicle or if it's been serviced regularly..point being, if you think it's relatively clean that you could just use 1/2 or 3/4 qt this time and maybe add the rest to your fuel at the recommended dosage. Keep a check on the oil level as sometimes the MMO will evaporate out with use...I used half a qt in a 4.0 Ranger (5 qt capacity) and it evaporated in 500 miles, I added half a qt of oil and finished the OCI without further usage.

Used at the recommended dose, it will lower the viscosity of the oil by about one grade so using a 40 wt oil will put you in the 30 wt range and so on...some people prefer to use it during the winter months for this reason.

If you think it needs a good cleaning, I'd use the full qt for a full OCI (3K to 5K depending on your driving conditions) and then do the same for the winter OCI each year from then on to keep everything clean.
 
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Go with one quart. I used MMO in my truck, which holds 6 quarts.

I went 5 quarts oil/1 quart MMO to desludge with no adverse effects.

If I had to do it all again however; with what I know now, I'd go a bit more extreme by running one OCI with 1.5 quarts MMO and 4.5 quarts 15w-40.
 
Definitely go with the quart. With that large sump capacity, a pint won't do much....

And yes, as mentioned previously, be sure to monitor the oil level at LEAST once a week after having it in the crankcase for 2 weeks. I've found that around 1-2k into my 3k OCI I will need a "top off" - it appears MMO either "evaporates" (through the PCV valve?) or gets "burned off" as it cleans......

And something I also noticed, after you "top off" the oil will look extremely dark...lol. That's the MMO+motor oil doing it's job, keeping the carbon/sludge in "suspension"....

When I added 1 pint of Oil to my 4.5 qt. capacity (basically 4 qts of Motor Oil, 1 pt MMO) I did not even notice the red MMO on the dipstick.....but after your first top off - generally mid OCI, you will notice the Oil get really dark.


Definitely wanna run the MMO in the crankcase for 3k miles, and for whatever length it takes you to get there. When I do 3k OCIs, typically, it's about "right on target" to change at 3 mos. anyways
wink.gif
But definitely keep the MMO in there for 3k miles. It's a slow cleaning process so it can take a bit to get everything cleaned up..


BTW, I like the idea about the MMO during the winter months. But I've ran it personally during the summer months with 5W-30 and no ill effects or anything "out of the ordinary" happening.
 
MMO recommends up to 25% and I read in their faq that they don't recommend going more than 3k miles with it in your engine.

I'm in the cleaning cycle myself and I first used 0.75 qt. MMO to 3.25 qt oil for a ratio of 19%. I just did an OC today and went with 1qt MMO to 3qt oil for a ratio of 25%. will do another run of 25% when I change it after 3k miles. Been using QSGB these past 2 OCs but will use PYB (for their active cleaning agent claims) with MMO next run.
 
Jeep is 176k miles. Just change out fuel filter and it run extreme smooth. No leak or burn oil. Just typical tick for 4.0l jeep. Since I don't know wat preview owner maintains. So I'm just do every tune up as possible. I think I spend 200 dollar on part and bloody and grease and cursing
smile.gif
manual require run 10w30 . Since these 4.0 require high zddp that y I choose T5

I'm back in college after 5 year break. So this jeep will be driving all time between class and home and back to class and work. I need it to be top condition as possible.
 
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Originally Posted By: 1WildPig
Well, the company says to use 20 to 25% of your total oil capacity, so 1 qt. would be fine. You didn't say how many miles you have on the vehicle or if it's been serviced regularly..point being, if you think it's relatively clean that you could just use 1/2 or 3/4 qt this time and maybe add the rest to your fuel at the recommended dosage. Keep a check on the oil level as sometimes the MMO will evaporate out with use...I used half a qt in a 4.0 Ranger (5 qt capacity) and it evaporated in 500 miles, I added half a qt of oil and finished the OCI without further usage.

Used at the recommended dose, it will lower the viscosity of the oil by about one grade so using a 40 wt oil will put you in the 30 wt range and so on...some people prefer to use it during the winter months for this reason.

If you think it needs a good cleaning, I'd use the full qt for a full OCI (3K to 5K depending on your driving conditions) and then do the same for the winter OCI each year from then on to keep everything clean.




This post has so much mis-information-I do not know where to start----MMO DOES NOT evaporate from the crankcase-it is 70% pale oil, and repeat, before someone takes this as fact does not evaporate. I do not know what happened to your Ranger-but it probably burned oil.
Second MMO DOES NOT lower the viscosity 1 full grade-this has been a misnomer repeated over and over, and it's simply not true. I have verified this with UOAs and digital oil pressure and digital oil temperature gauges
 
A qt will work just fine. Another option is to use a pint for the last 1000 miles of the current OCI. Then drop the oil and filter, add a qt of MMO in place of a qt of oil, and run it for the full OCI. I would not exceed 5000 miles. Just keep an eye on the oil level.
 
Unless it's really nasty 10% is plenty if you are doing maintenence doses. If it's more of a one shot deal then consider the 20%.
 
for my driving style, I dont drive much, 99% is in town short driving. 2000 miles is 6 month for me. So I alway change oil by month 5-6 month.
 
Originally Posted By: MetalSlug
for my driving style, I dont drive much, 99% is in town short driving. 2000 miles is 6 month for me. So I alway change oil by month 5-6 month.


In your case I would consider running MMO for a year then, maybe a pint during the spring summer OCI, and a qt for the fall winter OCI. Or just add a qt at each OCI for the year, it isn't going to hurt a thing.
 
steve20, mah fren, no mis-information reported here, just information...I said "evaporate" and maybe I should have said the oil level may go down for as much MMO as was added. This has been reported many times and it happened with my ranger that uses no oil on 4k OCI's, but did "go down" the amount of MMO added within 500 miles which was 1/2 qt, another 1/2 qt of oil was added and the level remained constant until change time.

Next, I said "about" a grade and this is even acknowledged on the MMO website by the company representatives. Your verification in your situation, may have been different but, it just makes sense that replacing a thicker oil with a thinner one would lower the overall viscosity, how much depends on how much of what kind of oil to MMO is used...maybe not enough to drop it one full grade with some oils, but still, some reduction occurs....at any rate, I just share my information to help others make informed decisions...each usage can be different from another due to all the variables involved so the more information shared, the more informed the decisions can be...right??
 
Originally Posted By: 1WildPig
steve20, mah fren, no mis-information reported here, just information...I said "evaporate" and maybe I should have said the oil level may go down for as much MMO as was added. This has been reported many times and it happened with my ranger that uses no oil on 4k OCI's, but did "go down" the amount of MMO added within 500 miles which was 1/2 qt, another 1/2 qt of oil was added and the level remained constant until change time.

Next, I said "about" a grade and this is even acknowledged on the MMO website by the company representatives. Your verification in your situation, may have been different but, it just makes sense that replacing a thicker oil with a thinner one would lower the overall viscosity, how much depends on how much of what kind of oil to MMO is used...maybe not enough to drop it one full grade with some oils, but still, some reduction occurs....at any rate, I just share my information to help others make informed decisions...each usage can be different from another due to all the variables involved so the more information shared, the more informed the decisions can be...right??

Plus it's info that matches what I've read in various other forums. And it's exactly what I have followed in the past to great results. Thanks for posting your advice. FWIW, I really appreciate it.
 
I have 1qt of MMO in a 4.0l with 87k on the clock. Its been in there for only 150 miles or so, I cant say if its doing anythinh yet. Oil is still spotless.
 
Originally Posted By: jdoria
I have 1qt of MMO in a 4.0l with 87k on the clock. Its been in there for only 150 miles or so, I cant say if its doing anythinh yet. Oil is still spotless.


MMO is not a fast flush, leave it in for the OCI. Remember if the engine was clean, you can't clean it! LOL Just keep an eye on the oil level, MMO does burn off in some vehicles.
 
Thanks JavierG, ...and to MetalSlug and the others, I just changed the oil in my '90 Chevy after finishing the rinse phase of an ARX clean/rinse cycle and I used 1 qt MMO to 4 qts Rotella T SAE 30. It's not driven a lot and will probably take me a year or more to get 2,500 ~ 3,000 miles...I'll check the level around every 500 miles to make sure it doesn't "lose" more than 1/2 a qt before being topped off.
 
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