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Engine Flush Additives and Treatment
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11-05-2015, 02:51 AM | #1 |
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Engine Flush Additives and Treatment
Not sure if anyone really posted about this, every time I would search it would show all "OIL" threads and posts...
Anyways I have a high millage 07 335i E90 with 117K Miles and have noticed sluggishness, smoke, burning oil, knocking and seen engine sludge. Before changing my oil I checked how it looked through the filter and it was fairly dark with 2K miles on it. I then added Motor Medic by Gunk not the turbo specific one but the regular one. After using Motor Medic for 5 minutes I immediately drained the oil and it was pitch black. After it completely drained I plugged the drain plug, added a new filter and put in 6 qts of new 0w-40 oil and 1 qt of Marvel's Mystery Oil. Immediately I noticed the car is more responsive and not knocking as loud. I've driven the car with Mystery Oil in it for about 200 miles now and have had no problems. The car practically runs as if it were new besides for the faint knocking. I then checked the oil and it was already dark showing that the Mystery Oil is doing it's job, or I just have a shit load of sludge buildup. I will be doing another oil change tomorrow or friday to see how much gunk I got and repeat for another 500 miles.
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11-05-2015, 04:32 PM | #2 |
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Did another oil change today checked filter and it was dark brown, used Motor Medic before draining oil and again it was pitch black when drained.
Once again after all the oil completely drained I added 6 qts of 0w-40 and 1 qt of Mystery Oil. Everything is still running smooth but this time it's quieter then before. I will repeat this process every fill-up if the filter looks dark brown, once it starts to clear out I'll stop.
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11-05-2015, 05:50 PM | #3 |
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That's good to hear!
What sort of oil service intervals has the car had through the years? |
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11-05-2015, 06:23 PM | #4 |
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oil change every 3K miles, occasionally 5K when I get really busy with my work schedule. I bought the car used in 2012 and the previous owner took it to BMW for all the "services" but when I checked it was OLD oil broken slush filter and sludge everywhere.
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11-05-2015, 06:59 PM | #5 |
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You most likely bought it "pre-sludged" thanks to BMW service intervals. What also works well to deal with sludge gently is some ATF added after draining about a litre of the existing old oil, drive the car gently for a while, then replace with fresh oil.
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11-06-2015, 11:59 AM | #6 |
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Yes as I said before there was a crap load of sludge when I bought it. When I bought it I did an engine flush as well as put diesel in the engine overnight. The diesel cleaned out a lot of gunk the next morning. I assumed it was clean after that because my oil was consistently clean for about 3K miles. But I recently had a valve cover leak and when I did that I saw a crap load of sludge still, so decided to start running some engine flush again.
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11-06-2015, 07:02 PM | #7 | |
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11-07-2015, 04:39 AM | #8 | |
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Update : checked the oil filter after 50 miles and it's already a dark golden brown.... Looks like I'll be doing an oil change every other day haha.
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11-07-2015, 05:21 AM | #9 |
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I find this thread interesting. Did you verify the previous owner had regular service done at BMW and used a good quality oil? And how was the car driven? I think your methodology of evaluating the color of the oil filter after it's been used for a few hundred miles is giving you a false negative. My N52 saw 17,500 mile OCIs from new to 221,000. After 221K I've switched to a 10,000 mile OCI (BMW recommends 7,500 once the CBS oil monitor system goes defunct). I've looked though the oil fill in the valve cover, looked in the VANOS solenoid holes, and looked into the oil pan through the oil sensor hole, and haven't found any traces of sludge anywhere. If only ever used BMW oil and OE filter shipped as a oil change kit from Tischer.
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A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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11-07-2015, 06:34 AM | #10 | |
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How is looking through the oil filter a false negative when I clearly stated when I drained it after it was pitch black? Also "looking through holes" doesn't show anything. If you want to see real sludge take your valve cover or oil pan completely off.
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11-07-2015, 07:08 AM | #11 | |
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An oil filter will look dark brown 5 minutes after oil is run through it, so the color of it indicates nothing. Further, I have a 1997 Z3 with the M44. I just replaced the timing chain case and valve cover gaskets, along with the OFHG (it's different than the profile gasket the N52/54 uses). I had the entire valve train exposed from the crankshaft all the way back to the rear of the head and the oil filter housing completely off. The engine is 18 years old with 170,000 miles, sees oil changes in accordance with BMW's OCI, which for the M44 from 1997 is about 9,000 to 11,000 miles (my wife drives this car, so it gets oil chnages about every 18 months or so). The car sits quite a bit in the colder months. In the late 90's synthetic wasn't even called for, so the engine used non-synthetic for years. Since 2003 or so I've been using synthetic in it. In 2006/7 I switched to BMW's oil for it. The engine didn't have a spec of sludge anywhere. Here's a pic for you viewing pleasure...
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A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
Last edited by Efthreeoh; 11-07-2015 at 07:48 AM.. |
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11-07-2015, 10:35 AM | #12 | |
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If yours is already black after 5 mins, drain a little and let's see the rest. Dark oil is dirty oil... Maybe you got lucky because around here in California bmws are notorious for sludge build up no matter the oil change interval. Maybe because we drive a lot.
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11-07-2015, 11:39 AM | #13 | |
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A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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11-07-2015, 12:11 PM | #14 | |
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11-07-2015, 04:34 PM | #15 | |
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Peace.
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A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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12-13-2017, 10:45 PM | #16 |
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I still feel you are more of a hardcore car guy who can DIY better than most of the people on this site. For the rest of the people, its still cheap insurance to do more frequent fluid/filter changes. While it is a waste of money, i have not heard of anyone saying they changed the fluid early and broke the car??
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12-14-2017, 09:56 PM | #17 | |
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I have a lift in my garage, I could change any fluid on the car any time I want, but it's a waste of money. By following the CBS maintenance schedule for engine oil on the E90 alone (vs. a 7,500 mile interval) I paid back the cost of the lift. I can post pics of the valve train on the N52 and the bottom of the block with the oil pan removed when I changed both the OPG and VCG in 2015/2016 at 293,000 and 300,000 miles respectively if you're interested. Not a drop of sludge.
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A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
Last edited by Efthreeoh; 12-14-2017 at 10:05 PM.. |
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12-16-2017, 11:31 AM | #18 | ||
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I agree, 3,000 or even 5,000 mile intervals are absurd and a waste of money if you just DD the car. Even with an N54. I have an 07 N54 with 147,000 miles on it. Original injectors and original turbos. I use Amsoil Euro Classic Blend 5w-40 and a Mann Filter every 7500 miles. The Amsoil is good for 15,000 miles. I always use an oil flush before I change the oil, and I always use Techron 20 gallon formula every 6 months. I also always use 93 octane. Take precautions like above not doing a $40.00 oil change every 3,000 miles. That's silly. |
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01-10-2018, 03:40 PM | #19 | |
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01-14-2018, 06:07 AM | #21 |
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Just the word sludge conjures up images of wax and tar: handy for the marketing machines and service managers to get additional revenue
Except for some design defect engines that had overly long OCI's on basic oil (remember LL01 is a longer life synthetic with stronger add packs), or a car run 30-50K on the same oil, you are not likely to have any real sludge. I have no issues running 7-8qt of good synthetic in these cars for the OCI BMW specifies just as Efthreeoh done. I do it for both of our BMWs (that are also turbo charged and not abused). If you want to do it more often for your own peace of mind, that's perfectly OK but don't think that you need to do that, or it prevents sludge. Nope - b |
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01-22-2018, 07:42 PM | #22 |
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DOUBLE OIL CHANGE (aka oil flush)
Intermediate flush oil can be woth just about anything, keep close in weight and type but use whatever is on sale at walmart (or wallys own supertech synthetic) and dont bother with any of that BMW Longlife nonsense. Use a new filter for each fill. |
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