Uh Oh...another ticking 545i?
04-14-2010, 09:08 AM
#31
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very interesting, thanks for the tip.
kinematic and dynamic visc data from mobil
40,100c for 0w-40 78.3; 14; 3.7
40,100c for 5w-30 64.8; 11.3; 3.09
40,100c for 10w-30 62; 10.0; 3.14
40,100c for 5w-50 104.6; 17.4; 4.3
i like to look at the last of the 3 values, the dynamic visc, the fluid's resistance to deformation, in pascal seconds.
from this data i would much rather use the 0w-40.
i would love to see some viscosity retention numbers for these 4 oils. been on bob is the oil guy website, no data comparing them all. but what i have seen is that mobil syn oils have by far the best visc retention compared to the other brands. they seem to lose most of their visc in the first 1000 miles and remain relatively flat after that, where many other oils continue to decline.
i know i'm not going to use castrol, i don't think its true syn like mobil, just a mega refined, fossil with loads of additives. there were some legal issues years ago about castrol making synthetic claims and mobil sued them, don't know the outcome.
there is so much hype, marketing, and personal opinions (mobil is my fav) when studying engine oils.
it ALWAYS comes back to what you already said, just change the oil often and drive the b*tch!
thanks
kinematic and dynamic visc data from mobil
40,100c for 0w-40 78.3; 14; 3.7
40,100c for 5w-30 64.8; 11.3; 3.09
40,100c for 10w-30 62; 10.0; 3.14
40,100c for 5w-50 104.6; 17.4; 4.3
i like to look at the last of the 3 values, the dynamic visc, the fluid's resistance to deformation, in pascal seconds.
from this data i would much rather use the 0w-40.
i would love to see some viscosity retention numbers for these 4 oils. been on bob is the oil guy website, no data comparing them all. but what i have seen is that mobil syn oils have by far the best visc retention compared to the other brands. they seem to lose most of their visc in the first 1000 miles and remain relatively flat after that, where many other oils continue to decline.
i know i'm not going to use castrol, i don't think its true syn like mobil, just a mega refined, fossil with loads of additives. there were some legal issues years ago about castrol making synthetic claims and mobil sued them, don't know the outcome.
there is so much hype, marketing, and personal opinions (mobil is my fav) when studying engine oils.
it ALWAYS comes back to what you already said, just change the oil often and drive the b*tch!
thanks
So whats the verdict?
04-14-2010, 10:50 AM
#32
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04-14-2010, 04:30 PM
#33
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IF you decide to try the 50 weight oil, definetly use the 5w-50 instead of the 15w-50. there is no reason to use a thicker oil when its cold.
04-15-2010, 07:37 AM
#34
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04-15-2010, 09:39 AM
#35
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if the oil is new, less than 500 miles or so, and i have no cold tick, then i think we can conclude that a slightly higher visc will get rid of the cold tick.
so when i change over to a new batch of mobil 0w-40 i'll check it every morning and keep track of if and when the cold tick returns.
this chart is the reason i prefer mobil over castrol. these oils were tested in a motorcyle engine, which is much harder on oil than any car engine, since it lubes the transmission,is exposed to the clutch, and typically revs to over 10k rpm. as can be seen the mobil syn kills the castrol syntec in visc retention.
is it true that bmw oils are rebranded castrol syntec? my car has 4500 miles on bmw oil right now, the visc must be only 70% of what it was, if i had mobil in there it would be 80% or so.
although the other chart concerns me a bit, comparing valvoline syn to mobil syn.
so when i change over to a new batch of mobil 0w-40 i'll check it every morning and keep track of if and when the cold tick returns.
this chart is the reason i prefer mobil over castrol. these oils were tested in a motorcyle engine, which is much harder on oil than any car engine, since it lubes the transmission,is exposed to the clutch, and typically revs to over 10k rpm. as can be seen the mobil syn kills the castrol syntec in visc retention.
is it true that bmw oils are rebranded castrol syntec? my car has 4500 miles on bmw oil right now, the visc must be only 70% of what it was, if i had mobil in there it would be 80% or so.
although the other chart concerns me a bit, comparing valvoline syn to mobil syn.
04-15-2010, 10:18 AM
#37
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My Ride: 2006 525XI, Jet black on Dakota beige. Premium and winter packages. I consider myself a purist and intend to keep my car absolutely stock and shiny.
2008 328I Convertible, Sapphire black on beige interior. Premium package, NAV, iPod adapter.
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A certain amount of lifter tick is to be expected at cold start on an aging car (any model). If the ticking does not go away when warm, then immediate action should be taken. If the ticking goes away upon warm up, then it's normal operation for an older engine. This applies to all makes and models.
04-15-2010, 10:42 AM
#38
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according to this study, mobil 0w-40 is crap!
holysh*t what to do????
http://www.animegame.com/cars/Oil%20Tests.pdf
holysh*t what to do????
http://www.animegame.com/cars/Oil%20Tests.pdf
Ok, bought my car last month. I have put over 2000 hard miles on it since. Car is a 6 speed manual and has 86k. The past few mornings I have noticed a small ticking under throttle coming from the passenger side engine bay. It is consistant with enigine speed but is very quiet yet noticable up to about 3.5 rpm when the engine noise drowns it out. It does seem to go away as engine temps wram up, but is definately noticable in the morning. It is a small tapping (almost sounds like a small exhaust leak from an old hot rod with aftermarket headers for those of you who know what that sounds like) not loud like the ticking 545i's on youtube, but is this an early sign of serious problems? Car runs fine and does not have a decrease in gas mileage. Let me know what you guys think.
04-15-2010, 01:32 PM
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according to this study, mobil 0w-40 is crap!
holysh*t what to do????
http://www.animegame.com/cars/Oil%20Tests.pdf
holysh*t what to do????
http://www.animegame.com/cars/Oil%20Tests.pdf