Used Oil Analysis - Post Them Here
01-07-2010, 02:27 PM
#101
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01-07-2010, 02:32 PM
#102
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01-07-2010, 03:59 PM
#103
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The car's probably using just as much fuel if you're doing 5mph in rushhour traffic for 30 miles as it is on a long 60mph cruise for 100 miles....
Just because the country is bigger doesn't mean people travel for longer
01-07-2010, 04:10 PM
#104
01-07-2010, 06:59 PM
#106
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Interesting. Did anyone post results of dino diesel 15w40 oil with 3k+ miles? I saw that OD posted his results which held the viscosities in range, but that was only with 1k miles.
Also, is anyone running Mobil's synthetic diesel? What is the viscosity range, and is it a full "real" syn?
Also, is anyone running Mobil's synthetic diesel? What is the viscosity range, and is it a full "real" syn?
01-07-2010, 07:39 PM
#108
Oil viscosity in range
Oh, really?
What range viscosity do you want? Do you want the 7 to 8cst@ 100C of 5w20 or the 15 to 16cst @ 100c of 20w50? Yeah, Mobil 1 0w40 spec sheet says approx 14cst@100c, but thats just candy and nuts, and the specs show way over a 10w30. My report still had a some 5w20 and the usual fuel dump even though I was real careful to heat up car before sampling.
People that bring up (didn't stay in range) are have 40 year old info from Andy Granatelli selling STP viscosity improver. These new 0w oils get the weight from good chemistry buildup not just throwing in extra vi improver which can cause hard carbon.
Your knee seems a little jerky.
What range viscosity do you want? Do you want the 7 to 8cst@ 100C of 5w20 or the 15 to 16cst @ 100c of 20w50? Yeah, Mobil 1 0w40 spec sheet says approx 14cst@100c, but thats just candy and nuts, and the specs show way over a 10w30. My report still had a some 5w20 and the usual fuel dump even though I was real careful to heat up car before sampling.
People that bring up (didn't stay in range) are have 40 year old info from Andy Granatelli selling STP viscosity improver. These new 0w oils get the weight from good chemistry buildup not just throwing in extra vi improver which can cause hard carbon.
Your knee seems a little jerky.
01-07-2010, 08:28 PM
#109
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Oh, really?
What range viscosity do you want? Do you want the 7 to 8cst@ 100C of 5w20 or the 15 to 16cst @ 100c of 20w50? Yeah, Mobil 1 0w40 spec sheet says approx 14cst@100c, but thats just candy and nuts, and the specs show way over a 10w30. My report still had a some 5w20 and the usual fuel dump even though I was real careful to heat up car before sampling.
People that bring up (didn't stay in range) are have 40 year old info from Andy Granatelli selling STP viscosity improver. These new 0w oils get the weight from good chemistry buildup not just throwing in extra vi improver which can cause hard carbon.
Your knee seems a little jerky.
What range viscosity do you want? Do you want the 7 to 8cst@ 100C of 5w20 or the 15 to 16cst @ 100c of 20w50? Yeah, Mobil 1 0w40 spec sheet says approx 14cst@100c, but thats just candy and nuts, and the specs show way over a 10w30. My report still had a some 5w20 and the usual fuel dump even though I was real careful to heat up car before sampling.
People that bring up (didn't stay in range) are have 40 year old info from Andy Granatelli selling STP viscosity improver. These new 0w oils get the weight from good chemistry buildup not just throwing in extra vi improver which can cause hard carbon.
Your knee seems a little jerky.
Still, when we're talking about 1 to 2 cSt of viscosity loss that's really not a huge deal. Even less when you're looking at that loss occurring over 4,000 miles of use.
As for Diesel oil...just remember that oil choice comes down to application. You can run just about anything off the shelf in your motor and you'll be ok but some stuff is simply a better fit for how you use the car.
01-07-2010, 09:14 PM
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Interesting. Did anyone post results of dino diesel 15w40 oil with 3k+ miles? I saw that OD posted his results which held the viscosities in range, but that was only with 1k miles.
Also, is anyone running Mobil's synthetic diesel? What is the viscosity range, and is it a full "real" syn?
Also, is anyone running Mobil's synthetic diesel? What is the viscosity range, and is it a full "real" syn?
01-07-2010, 10:03 PM
#112
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Take a look at my analysis I had done on 15W40 with 3k on it. It still was within range. There is a link to my post on the first page of this thread.
Care to share your driving habits? Viscosity is low.
Last edited by 9krpmrx8; 01-07-2010 at 10:10 PM.
01-08-2010, 04:13 AM
#113
rx8convert22 15w40
This uoa is from your 5w30 @ 14k, and with the usual excess fuel looks like 0w20. I saw your uoa on your Shell Rotella 15w40 diesel oil with 12.5 cst@100c, and you have found your oil.
I know a guy in West Texas with the usual Chevy pu with 350 v8 that is still running at around 1/2 million miles without any internal work using Rotella 15w40.
You and olddragger are onto something because its over kill additives @ good price.
I run 0w40 Mobil 1 because it tests about 12cst @ 100c to maybe stop that front stationary bearing wear, and it tested the most hp and torque of many heavy weight in a dyno test.
I know a guy in West Texas with the usual Chevy pu with 350 v8 that is still running at around 1/2 million miles without any internal work using Rotella 15w40.
You and olddragger are onto something because its over kill additives @ good price.
I run 0w40 Mobil 1 because it tests about 12cst @ 100c to maybe stop that front stationary bearing wear, and it tested the most hp and torque of many heavy weight in a dyno test.
01-08-2010, 05:00 AM
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Well, I'm still split between sticking with Rotella 15-40, and switching to Mobil1 0-40. But the good news is that they both sound solid for the Renesis. Maybe I'll run a 50/50 blend of the two.
01-08-2010, 10:21 AM
#115
01-08-2010, 01:54 PM
#120
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Wear metals were high in my GC 0W-30 and the were slightly higher in the 15W-40 vs. the Mobil1 0W-40 results posted by REDRX3RX8. I wish we could create some type of comparison chart for the renny. There are a lot of variables here.
01-08-2010, 03:16 PM
#121
It will take a tremendous amount of data to prove meaningful correlations between viscosity & bearing wear via UOA. Case in point, if I'm not mistaken, one of the reports on this thread with the lowest Iron content is somebody running Castrol 5w20.
I still think UOAs are good idea, and I'll post my results here soon. But, an enterprising person could start a spreadsheet and collect the data as it is entered, and over time we could, perhaps, begin to see trends.
I still think UOAs are good idea, and I'll post my results here soon. But, an enterprising person could start a spreadsheet and collect the data as it is entered, and over time we could, perhaps, begin to see trends.
01-08-2010, 04:38 PM
#122
yep--- its more trend related for that particular engine that on a unified grand scale of things.
With enough data maybe some specific cooralation could be done--but yes i agree it would take a lot.
One thing I believe that has already become apparent ---the viscosity showings are mostly so far not standing up as some may think?
The flash points are lower than some may think also?
When it comes to wear metals---a LOT has to taken into consideration--including air filtration
driving enviroment, temps, adverage load on engine etc. I know you can make a case on the same affecting viscosity and it does but you can have wear metals without viscosity probs but not the otherway around?
OD
With enough data maybe some specific cooralation could be done--but yes i agree it would take a lot.
One thing I believe that has already become apparent ---the viscosity showings are mostly so far not standing up as some may think?
The flash points are lower than some may think also?
When it comes to wear metals---a LOT has to taken into consideration--including air filtration
driving enviroment, temps, adverage load on engine etc. I know you can make a case on the same affecting viscosity and it does but you can have wear metals without viscosity probs but not the otherway around?
OD
01-08-2010, 05:27 PM
#123
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It will take a tremendous amount of data to prove meaningful correlations between viscosity & bearing wear via UOA. Case in point, if I'm not mistaken, one of the reports on this thread with the lowest Iron content is somebody running Castrol 5w20.
I still think UOAs are good idea, and I'll post my results here soon. But, an enterprising person could start a spreadsheet and collect the data as it is entered, and over time we could, perhaps, begin to see trends.
I still think UOAs are good idea, and I'll post my results here soon. But, an enterprising person could start a spreadsheet and collect the data as it is entered, and over time we could, perhaps, begin to see trends.
01-08-2010, 09:44 PM
#125
nice Z&P levels.
and this is a synthetic --right?
i dont have the ability to scan mine in but i will type it out
Brand new engine
oil use interval 2K (after the 1st 500 miles with break in OIL)
diesel oil 15w/40
al--1
chr-5
iron-19
copper-2
lead-15
tin-1
moly-12
nickel 1
magenese 0
silver--0
Titanium and potasium --o
boron--44
silicon--10
sodium 6
calcium 1098
manesium-620
phos-912
zinc--1050
barium-0
sub viscosity at 210F = 61.0 should be 70-81
cST vis at 100C =10.50 --should be 12.9-16
flashpoint 355 should be greater than 390
fuel % 1.8%
not too bad for a new engine.
next will be maybe in 2 weeks and i am waiting to see if my higher oil temps have improved the fuel percentage.
OD
and this is a synthetic --right?
i dont have the ability to scan mine in but i will type it out
Brand new engine
oil use interval 2K (after the 1st 500 miles with break in OIL)
diesel oil 15w/40
al--1
chr-5
iron-19
copper-2
lead-15
tin-1
moly-12
nickel 1
magenese 0
silver--0
Titanium and potasium --o
boron--44
silicon--10
sodium 6
calcium 1098
manesium-620
phos-912
zinc--1050
barium-0
sub viscosity at 210F = 61.0 should be 70-81
cST vis at 100C =10.50 --should be 12.9-16
flashpoint 355 should be greater than 390
fuel % 1.8%
not too bad for a new engine.
next will be maybe in 2 weeks and i am waiting to see if my higher oil temps have improved the fuel percentage.
OD
