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05-24-2016, 02:05 PM
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#21
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: May 2013
Location: Les Bois
Posts: 5,761
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also, look up "mobil 1 Subaru spun rod bearing"
mobil 1 has also killed a lot of turbo scoobs
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05-24-2016, 02:13 PM
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#22
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Jan 2008
Location: NC
Posts: 21,200
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I change synthetic oil every 10K miles, conventional oil every 5K miles. I've never changed oil at 3K miles.
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No one agrees with other people's opinions; they merely agree with their own opinions -- expressed by somebody else. Sydney Tremayne
Retired Jun 2011 at age 57
Target AA: 50% equity funds / 45% bonds / 5% cash
Target WR: Approx 1.5% Approx 20% SI (secure income, SS only)
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05-24-2016, 02:36 PM
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#23
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Thinks s/he gets paid by the post
Join Date: Apr 2012
Location: Nashville
Posts: 2,504
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Synthetic. Every 12,000 miles (which is what my Fit's monitor indicates m/l)
We had a 1992 Toyota van that we ran for 360,000 miles after purchasing new. Recollection is that we changed conventional oil every 7500 or so on that one, per the manual. (of course, in the last years, we were topping it off too)
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OMY * 3 2ish Done 7.28.17
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05-24-2016, 02:49 PM
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#24
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Gone but not forgotten
Join Date: Jul 2012
Location: Peru
Posts: 6,335
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Quote:
Originally Posted by ERD50
It should not be controversial - just follow the manual for your car. I don't know about mixing synthetic oil, does the manual address that?
-ERD50
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My '96 SLS manual doesn't address synthetic oil. Up until that time, Synthetics were used mostly in race cars, BMW's, Porche's and like that. I don't think it became common for US passenger cars until a little later, but maybe I'm wrong...
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05-24-2016, 02:50 PM
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#25
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Thinks s/he gets paid by the post
Join Date: Dec 2015
Location: Michigan
Posts: 4,960
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My 2006 car I changed at 5000 miles with conventional, and my 2015 car I do 7500.
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"The mountains are calling, and I must go." John Muir
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05-24-2016, 02:53 PM
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#26
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: May 2013
Location: ATL --> Flyover Country
Posts: 6,649
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Quote:
Originally Posted by Big_Hitter
also, look up "mobil 1 Subaru spun rod bearing"
mobil 1 has also killed a lot of turbo scoobs
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Reading through some search results (with and without Mobil 1 in the terms), it doesn't appear as though OIL it the reason for these failures. Several folks have complained about it when they used Amsoil (arguably one of the top oil manufacturers) and some are with some VERY low mileage cars.
And overwhelmingly, I see a trend with these cars..."It just happens on modified, beaten on, and abused cars". Well, duh.
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FIRE'd in 2014 @ 40 Years Old
Professional Retiree
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05-24-2016, 03:01 PM
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#27
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: May 2013
Location: ATL --> Flyover Country
Posts: 6,649
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I am a little curious now. When I had my plane, I sent oil off fairly often to be analyzed. Looking at "Bob the Oil Guy" website, there is a kit available for cars as well. The analysis is $28, so I think when I get my oil changed in my 90K mile Infiniti (it will have about 94K miles on it then) I am going to send in a sample. I am curious to see what it shows...I tend to think it will show not very much wear.
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FIRE'd in 2014 @ 40 Years Old
Professional Retiree
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05-24-2016, 03:18 PM
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#28
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Thinks s/he gets paid by the post
Join Date: Nov 2011
Posts: 3,876
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Quote:
Originally Posted by ERD50
I think a statement like that needs some back up! Is there data to say that exceeding the manufacturer's schedule will actually reduce wear?
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If oil breakdown or contaminants lubricated at least as well as fresh oil, the oil would not need regular changing. Since that is not the case, old/used oil causes more engine wear than clean oil. How soon (how many miles or hours of operation) the difference in engine operation due to such wear becomes measureable is a valid question though.
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05-24-2016, 03:45 PM
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#29
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Thinks s/he gets paid by the post
Join Date: Sep 2013
Location: Cincinnati, OH
Posts: 4,353
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I just do every 5K because it is easy to remember in my daily driver type cars. I tend to use synthetic blend or full synthetic if I find a deal. Always change my own oil and filter, gives me a good chance to look things over. Yes the 5K might be slight overkill, but oil is cheap.
Imoldernu, you can mix synthetic with dino without any problems. In fact most "synthetic" oil sold is actually dino based. It is just more refined and maybe slight changes to the additive package. Real lab-based synthetic oils are much higher cost. Some engines (some Toyota and Dodge as examples) do have sludging problems and synthetic oil will minimize this.
Now, how many of you ever think or actually do change your auto trans fluid? I do, every 30K I do a drain and refill. No filter change, the auto trans filter is not always accessible on some vehicles. There is no such thing as lifetime trans fluid fill, in spite of what mfrs may claim. By doing the drain and refill, I change out maybe 30-50% of the old fluid and my trans fluid is always nice and clean red color without burnt smell.
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The problem isn't artificial intelligence, it's natural stupidity.
You can't spend yourself to prosperity.
Semi-Retired 7/1/16: working part-time (60%) for now [4/24/17 changed to 80%]
Retired Aug 2, 2017; age 53
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05-24-2016, 03:50 PM
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#30
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Moderator Emeritus
Join Date: Apr 2011
Location: Conroe, Texas
Posts: 18,642
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Quote:
Originally Posted by FlyBoy5
I am a little curious now. When I had my plane, I sent oil off fairly often to be analyzed. Looking at "Bob the Oil Guy" website, there is a kit available for cars as well. The analysis is $28, so I think when I get my oil changed in my 90K mile Infiniti (it will have about 94K miles on it then) I am going to send in a sample. I am curious to see what it shows...I tend to think it will show not very much wear.
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I use Blackstone Labs in Indiana. They will send you a kit.
Blackstone Labs
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*********Go Astros!*********
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05-24-2016, 03:52 PM
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#31
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Sep 2005
Location: Northern IL
Posts: 26,819
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But what does the manual say regarding regular oil changes? From there, you could get opinions (or ask the mfg, who may or may not advise past the manual), on if it makes sense to stretch that with synthetic.
Quote:
Originally Posted by GrayHare
If oil breakdown or contaminants lubricated at least as well as fresh oil, the oil would not need regular changing. Since that is not the case, old/used oil causes more engine wear than clean oil. How soon (how many miles or hours of operation) the difference in engine operation due to such wear becomes measureable is a valid question though.
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That's my point. Is there a meaningful difference in engine life with more frequent than recommended oil changes? If the mfg says change at 6,000 miles, I doubt changing at 3,000 doubles engine life, or changing at 600 miles makes it last 10x longer, for example. It's clearly not linear, so where is the 'knee'? Maybe 6,000 is before the knee, and changing at 5,000 is really a very tiny difference?
If I were planning to keep a car for 120,000 miles or more (I keep my cars a long time, but they are still pretty low miles), I might get in the habit of going just a little early, just to provide a buffer if it was inconvenient, or to get in the habit of not going past the recommended mile mark. It just seems very few cars actually suffer from engine wear out problems that could be attributed to lubrication these days, rather than eventual break-downs, and non-engine problems. But no, I don't have data, just my observation - but it would be interesting if any is out there.
-ERD50
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05-24-2016, 03:59 PM
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#32
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Sep 2005
Location: Northern IL
Posts: 26,819
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Quote:
Originally Posted by aja8888
I use Blackstone Labs in Indiana. They will send you a kit.
Blackstone Labs
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I know someone with a small fleet of diesel trucks and the oil capacity is something huge, many gallons, so an oil change is big $$$. He uses a lab to help determine when to change, and he says it's always good even after the recommended interval, but I don't think he pushes it too far out. He tests more to make sure nothing is going wrong at that point (I think it will detect metal from a bearing, or maybe dilution from rings/valves going bad?). These trucks have a lot of stop/go, long idle times too.
-ERD50
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05-24-2016, 04:06 PM
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#33
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Moderator Emeritus
Join Date: Apr 2011
Location: Conroe, Texas
Posts: 18,642
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Quote:
Originally Posted by ERD50
I know someone with a small fleet of diesel trucks and the oil capacity is something huge, many gallons, so an oil change is big $$$. He uses a lab to help determine when to change, and he says it's always good even after the recommended interval, but I don't think he pushes it too far out. He tests more to make sure nothing is going wrong at that point (I think it will detect metal from a bearing, or maybe dilution from rings/valves going bad?). These trucks have a lot of stop/go, long idle times too.
-ERD50
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The analysis looks at all the engine metals (aluminum, iron, zinc, magnesium, etc) to see if the oil is picking up high concentrations or reducing the additive metals in the oil, like zinc. Other parameters are measured including certain chemical properties, pH, viscosity, etc. The biggie is TBN which is the "additive package" in the oil. Once that's depleted, the oil doesn't work very well anymore.
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*********Go Astros!*********
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05-24-2016, 04:14 PM
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#34
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: May 2013
Location: Les Bois
Posts: 5,761
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anyone else running a magnetic drain plug?
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You can't be a retirement plan actuary without a retirement plan, otherwise you lose all credibility...
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05-24-2016, 04:15 PM
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#35
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Moderator Emeritus
Join Date: Apr 2011
Location: Conroe, Texas
Posts: 18,642
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Blackstone labs
For those interested, here's an old analysis I did on a diesel Passat 7 years ago. I was interested in metals rates of decline after I did some major engine work (click on the attachment to make it bigger):
Blackstone Analysis.jpg
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*********Go Astros!*********
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05-24-2016, 04:46 PM
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#36
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Dec 2014
Location: Huntsville, AL/Helen, GA
Posts: 6,002
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Quote:
Originally Posted by Big_Hitter
I only use Mobil 1 on my truck. That oil is bad for turbo scoobs.
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I'm a follower of the #1 place online to talk about motor oils and lubrication: BobIsTheOilGuy.com. I can read for hours on there.
Note that there are two Mobil 1's--Regular Mobile 1 and Mobil 1 EP which is a far superior product.
Although Mobil 1 EP is not rated for marine use, it's a far superior lubrication to anything Mercury or Yamaha sells for their engines. And I run it in my boats.
I was at a big national auto parts store last night buying oil for one vehicle, and they're really, really expensive on oils and especially oil filters. I'll be going to Walmart tonight to get oil for the boat as they're much more reasonable in price and carry great brands.
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05-24-2016, 05:06 PM
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#37
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Administrator
Join Date: Apr 2006
Posts: 22,971
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My daily driver is a 2008 Honda Civic Hybrid. I change the oil whenever the monitor says it is time, which is about 9000 miles. I do it myself and always use Mobil 1 0W-20 full synthetic. Since it has 221,600 miles on it now, that means I've changed the oil 24 times so far. Got another one due in about 3 weeks.
I also have a magnetic drain plug.
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Living an analog life in the Digital Age.
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05-24-2016, 05:25 PM
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#38
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Jul 2008
Posts: 35,712
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Quote:
Originally Posted by ERD50
.. It just seems very few cars actually suffer from engine wear out problems that could be attributed to lubrication these days, rather than eventual break-downs, and non-engine problems. But no, I don't have data, just my observation - but it would be interesting if any is out there.
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That is my observation as well. Unless one abuses his car, most modern cars can get to 150K-200K miles without major engine problems.
Usually, people sell their cars when they do not want to spend money to fix a myriad of things that start to wear out, but not having anything to do with the engine. And also, the paint is fading, the leather seats are cracked, the doors rattle, etc...
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"Old age is the most unexpected of all things that happen to a man" -- Leon Trotsky (1879-1940)
"Those Who Can Make You Believe Absurdities Can Make You Commit Atrocities" - Voltaire (1694-1778)
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05-24-2016, 06:50 PM
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#39
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Aug 2013
Location: Texas
Posts: 10,863
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Quote:
Originally Posted by Big_Hitter
anyone else running a magnetic drain plug?
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yes
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05-24-2016, 06:53 PM
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#40
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Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Join Date: Aug 2013
Location: Texas
Posts: 10,863
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Quote:
Originally Posted by 38Chevy454
I just do every 5K because it is easy to remember in my daily driver type cars. I tend to use synthetic blend or full synthetic if I find a deal. Always change my own oil and filter, gives me a good chance to look things over. Yes the 5K might be slight overkill, but oil is cheap.
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Sounds familiar. Must be a thing with car guys.
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