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11-16-2013, 06:24 PM | #23 |
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Who knows.....?
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12-02-2013, 09:01 AM | #25 |
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I am on Mobil 1 0W40 for the last oil change. Car runs smooth, warms up more quickly, has lower normal operating temp. MPG is also approximately ~3.0 MPG better.
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12-02-2013, 02:30 PM | #26 | |
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Basically, M3Post theory of thinner oil = more oil where needed to help mediate rod bearing issue aside, will the thinner oil result in less wear/tear on motor and longevity due to better efficiency (as seen in MPG), or is this greater efficiency resulting in thinner oil thus creating MORE friction among moving parts?? Sorry, I don't know much about motor engineering and I'm beating a dead horse at this point, just wondering if my wonders are answerable or irrelevant (Seems like the latter) |
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12-02-2013, 02:55 PM | #27 | |
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12-02-2013, 03:38 PM | #28 |
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M1 0w40 is about 25%-30% thinner than TWS in operation. That does not, however, equate to 25-30% better gas mileage. I think you'll find that after running several tanks of gas it *might* be 1mpg better, perhaps less.
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12-02-2013, 03:39 PM | #29 |
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Good to know. 3 MPG increase at an assumed 16-20 mpg average is a monumental increase. Dat der placebo affect
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12-02-2013, 04:10 PM | #30 |
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Using it for the winter. I find the car is less throttle-sensitive in first and second when cold.
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12-02-2013, 05:03 PM | #32 |
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Hmm.. I was fixated on manually calculating my MPG's for the past several times I filled up. I commute about 90 miles per day mostly highway driving. Prior to switching to 0W40, I was getting in the 13~14 MPGs and after the switch to Mobil 1 0W40 this past oil change, the last several 5 or 6 times calculating manually, I got anywhere from 16.5-17.7 MPG. I don't think I have changed my driving habit any. Maybe its a coincidence though. I did also have a supercharger. I will have to see how it is now that it is NA again.
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12-02-2013, 05:07 PM | #33 | |
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12-02-2013, 05:10 PM | #34 | |
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12-06-2013, 06:12 PM | #37 |
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It is pretty tempting to switch to the 0W-40.
It seems like 0W-40 will be plenty (and probably even better engine protection) for street driving. Hard to justify the slow warmup and cost of 10W-60 if a lighter weight oil properly lubricates the engine when I'm not tracking the car and experiencing sustained increased oil temps. |
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12-07-2013, 12:29 PM | #38 | |
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M1 0w40 is a streetable race oil (Mobil markets it as such). Should work nicely on the track too.
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12-08-2013, 10:23 AM | #39 |
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Just to confuse things...if you go to the UK Mobile website:
http://www.mobil.co.uk/UK-English-LC...which-oil.aspx it suggests Mobil 1 Extended Life 10W-60 for the E9x M3. The idea of using a thinner oil for the N. European climate seems appealing...but I hate to find out in 20K miles that it wasn't. |
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12-09-2013, 07:48 AM | #40 |
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It's now 3 days post switching to Mobil 1 0W40 and it seems to have made an improvement in smoothing cold-weather starts, which is what I was hoping for.
The engine warms up a touch faster and there is much less jerking/lurching in the lower gears prior to proper warm-up. (Sure, it might be placebo or the fact that new oil is being used, but I'm trying to be as objective as possible) I'm thinking that this oil is a bit kinder/gentler for daily driving |
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12-09-2013, 08:39 AM | #41 | |
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Why wouldn't it be okay?
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12-09-2013, 09:16 AM | #42 | |
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Value Viscosity, cSt (ASTM D445) @ 40º C 152.7 @ 100º C 22.7 Viscosity Index 178 Sulfated Ash, wt% (ASTM D874) 1.4 Phosphorous, wt% (ASTM D4951) 0.13 Flash Point, ºC (ASTM D92) 234 Density 15.6ºC g/ml (ASTM D4052) 0.86 Total Base Number (ASTM D2896) 11.8 MRV at -30ºC, cP (ASTM D4684) 25,762 HTHS Viscosity, mPa•s @ 150ºC (ASTM D4683) 5.7 That is even thicker that the tws oil. Dang This one looks alot better http://www.mobil.co.uk/UK-English-LC...ife-0w40.aspx# Although I keep the car in a climate garage it was 0c when I left for work this morning. I can only image how thick that is at that temp. I see an experiment coming soon.
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12-09-2013, 10:08 AM | #43 |
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I have no idea...its just the song and dance that BMW make about using the TWS oil - it makes you wonder what they might know but aren't telling us (most likely nothing).
My car will always be under warranty so I'm not that fussed, plus my car is garaged so it never gets that cold - still as I say a lighter weight oil seems to make sense if you aren't tracking....I'm just not going to risk BMW voiding my warranty should my engine go tits up. |
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12-09-2013, 11:08 AM | #44 |
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I changed my oil out for Mobil 1 0w40 this weekend.
I had a cocktail of Redline 0w40 and 10w60. It was a mix of 3 quarts 0w40 and 6 quarts of 10w60 Redline. The Redline oil really made the car feel sluggish compared to TWS and it didn't really want to rev. I tried to make the 10w60 thinner by mixing the 0w40 in but I probably didn't put in enough 0w40 to really make a difference. I dumped my Redline oil with only 200 miles on it (wasted my money on that!) and got Mobil 1 0w40. Walmart was sold out of the 5 quart jugs and I ended up cleaning their shelves of 0w40 with 9 single quart jugs... it cost a lot more but still cheaper than any auto parts store. Cold start up I don't really notice any difference. It still takes a while to warm up. Gas mileage I don't notice any change. The difference I could definitely feel is the speed the engine revs now! The engine feels so much more responsive and it wants to rev fast. The RPMs climb much faster and more willingly than on the Redline. I took the car to autocross yesterday and the car felt great on the 0w40. Coming out of corners, you get instant throttle response. The willingness to rev fast really makes the car feel alive. Lesson learned ... don't use Redline 10w60!
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