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downsides to changing oil every 6k miles vs 12k?
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11-25-2011, 08:40 PM | #45 | |
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Last edited by ENINTY; 11-26-2011 at 04:44 AM.. |
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11-26-2011, 12:00 AM | #46 | |
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As entertaining as it is to read you frequently post about rarely changing the oil in your car with xxxK miles and boast that it still runs - my old girlfriend has you beat. She has a 98 Toyota Camry V6 with 267K miles and she has never changed the oil with any frequency, if at all - her car still runs fine too. Her theory is much like yours, if the engine doesn't blow, it must be ok to not change the oil often. If you feel good about doing the manufacture's minimum required maintenance (e.g., following the idiot light), it's your car, blindly do what you like. Bashing others for using real world science vs. your guesswork will continue to make you look silly. |
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11-26-2011, 12:20 AM | #47 | |
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In simple terms - going by BMW's CBS with 15k on the same oil and filter is too long. Can't argue science... |
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11-26-2011, 05:29 AM | #48 | |
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I can only conclude that the reason she's your "old" girlfriend is because she had no mechanical sympathy either. You must be a member of DETA - Drivers for the Ethical Treatment of Automobiles. I've not bashed anyone, nor called them names. I've merely pointed out the fact that BMW has done the scientific testing already, and in real world practice it has proven to work. You know, it's funny, every time I take apart parts of my engine - like looking in the valve cover during an oil change, looking in the VANOS solenoid ports (when cleaning the solenoids), inspecting the oil filter housing (which I had off yesterday replacing the profile gasket) - I never find any evidence of oil sludge. I want it to be there so I can prove you guys are right and I'm wrong, but it never turns out that way. |
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11-26-2011, 09:16 AM | #49 |
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this isn't about being an idiot, a genius, or knowing how to format words.
It's merely a difference of opinion on the upside/downside of waiting to change your oil. The only downside I see in changing your oil early is that perhaps by being overly cautious you are spending a few hundred dollars in the life of your car that was unnecessary. Almost like changing your tires before they are completely bald. Plus side is that your engine will be running at its best and you will get to use your tools and time like us car guys like. Downside to waiting is that you could be risking engine life if you wait too long, plus side is your hands stay clean and you may save a few hundred bucks if in fact your oil did not absolutely need changing. Regardless, i respect ENTITY and TOM and whomever else made comments- they are simply their opinions. BTW, VICTORIAS SECRET FASHION SHOW IS IN 3 DAYS 11/29 |
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11-26-2011, 10:10 AM | #50 | |
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The flaw in your thinking is basing sludge as an indicator of oil/engine health. Looking inside the oil fill hole is no way to know if you are using the same oil/filter too long. Syth oils don't really have the same sludge issue like the dyno oils once did; that is unless you never change the oil. What you are overlooking on your quest to find sludge is the actual condition of the oil. Can you visually see if the oil is viscosity is diminishing? Can you visually tell how much active additive is left in the oil? Can you visually tell if that 5w30 BMW oil with 17.5k miles on it is still a considered a 30 weight? Or how about how much wear the oil is causing due to the worn out filter element? Before you do another full tear down on your engine again and look inside oil fill hole, the answer is no you can't visually see any of the aforementioned without oil analysis. Extended oil/filter change intervals without oil analysis is guesswork. Following BMW CBS is considered minimum maintenance and that applies to just about every fluid in the car. |
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11-26-2011, 11:13 AM | #51 |
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Problem is that the computer usually will recomend it at more like 18,000miles or so. That has been my experience.
Additionally, there is no way I would go with the extended interval in a turbo charged engine. I simply don't trust any oil that long...period. UOA's show the BMW oil is good upto about 10,000 miles. Change it every 7,500 miles or so and you will be good. |
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11-26-2011, 01:02 PM | #52 | |
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11-26-2011, 02:15 PM | #53 | |
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How about sharing the viscosity of the that oil at 17K mile??? |
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11-26-2011, 08:57 PM | #54 | |
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OCI's: 17,640 29,950 - Checked accuracy of oil condition/level sensor when showing 1/2 quart down. 38,134 54,252 71,517 89,670 107,455 126,127 143,448 161,344 Go do the math... |
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11-27-2011, 12:16 AM | #55 | |
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11-27-2011, 01:24 AM | #56 |
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To answer the ops question, there is no downside to change oil every 6k except for a lighter wallet. Can we close the thread now?
My personal experience, purchased a 2000 323i new and changed oil at 15k intervals, it is still on the road after 200k. For my current car I am changing at 10k just to feel warm and fuzzy. Also, I kinda don't trust BMW's recommendations after they claim that the trans fluid is 'lifetime."
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If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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11-27-2011, 02:55 AM | #57 |
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one downside i have is that you get just serviced smooooooth engine syndrome(purs at cruising speed and quieter at idle) after the more frequent oil changes so u get to experience it more frequently
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11-27-2011, 09:01 AM | #58 |
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You've wondered off on your own discussion again, as per usual....
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11-27-2011, 04:34 PM | #59 | |
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http://neptune.spacebears.com/cars/stories/mobil1.html "Engine wear actually decreases as oil ages. This has also been substantiated in testing conducted by Ford Motor Co. and ConocoPhillips, and reported in SAE Technical Paper 2003-01-3119. What this means is that compulsive oil changers are actually causing more engine wear than the people who let their engine's oil get some age on it." |
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11-27-2011, 04:52 PM | #60 |
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11-27-2011, 04:54 PM | #61 |
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[QUOTE=samchoi604;10847460]Still a relatively new engine (4 years). Oil change costs me $70 for BMW approved oil and filter.
Ye Gods, the oil filter costs more than that here in Switzerland and you don't want to know how much the correct oil is and then labour, you dont get any change out of 500 bucks, this is why we dont usually go for low millage changes, that said we also don't get premature Turbo or engine failure. I am on 136,000 Km with no lubrication related failures and I go with BMW reccomended maint periods. Motor oil has changed so much in the last 20 years, bearing no or little resemblance to old school oils, trust the professionals and save your cash.
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11-27-2011, 05:18 PM | #62 | |
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Therefore, according to them, changing your oil every 3,000 miles may cause extra wear to your engine. 6k oil changes close enough. Personally, 10k for me.
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If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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11-27-2011, 07:10 PM | #63 |
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Since new oil increases wear over used oil and Blackstone has confirmed the oil to be fine at 15K I'm following what BMW mandates.
Last edited by HT1000; 11-27-2011 at 07:16 PM.. |
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11-27-2011, 07:20 PM | #64 |
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The only problem, BMW doesn't mandate changing the oil filter. I definitely would change the filter half-way between changes.
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If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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11-27-2011, 07:23 PM | #65 |
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11-27-2011, 07:29 PM | #66 | |
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It makes sense, what is the purpose of a filter, it traps contaniments, therefore changing the filter can't hurt especially if you are going to do the 15k change interval.
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If no codes are being thrown use Chevron Techron fuel injector cleaner (concentrate). It solves rpm fluctuating upon cold start-up. Also, for most BMW problems start off by scanning your car with the Peake Research Tool. It contains the actual BMW codes. If you want to register a newly installed battery for free (just buy a $10 cable) and google/download BMWLogger
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