V8 Oil analysis
#1
V8 Oil analysis
Just posted this in the F type area and thought I would get this going here it would be nice to increase the sample size at Blackstone.
For those with the 5.0, have you done an oil analysis yet?
I sent a sample to Blackstone and found out they do not have any averages for the V8 which is surprising considering they are one of the leading oil analysis companies in the US.
I have attached my analysis and I will basically invalidate it due to me not grabbing the sample when I drained so I have no idea where in the drain the sample came from, early or late in the drain can increase the amount of metals and throw off the results.
That being said I will be changing the oil every 7500 miles and will send another sample in for analysis.
If you are near Fort Wayne they accept drop offs that saves the hassle of dealing with the post office to mail used oil.
For those with the 5.0, have you done an oil analysis yet?
I sent a sample to Blackstone and found out they do not have any averages for the V8 which is surprising considering they are one of the leading oil analysis companies in the US.
I have attached my analysis and I will basically invalidate it due to me not grabbing the sample when I drained so I have no idea where in the drain the sample came from, early or late in the drain can increase the amount of metals and throw off the results.
That being said I will be changing the oil every 7500 miles and will send another sample in for analysis.
If you are near Fort Wayne they accept drop offs that saves the hassle of dealing with the post office to mail used oil.
Last edited by boiler; 01-10-2016 at 08:41 PM.
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plums (01-12-2016)
#3
I've had this done before on other vehicles, generally the presence of heavy metals indicates engine wear. It definitely helps to have a baseline with other engines of the same type, but if it was me I would do several of these and grab sample at each oil change after varying the mileage intervals. The purpose is to dial in exactly what the proper oil change interval is for your specific car based on whether you are at the end of the oil's life.
I did this back on my old TL-S and found that the factory MID's recommendations for oil changes was almost dead on with how often I should change the oil (I believe that car was 5500 miles). If I drove my car more I would do this but frankly I am hitting the time interval on oil changes before the mileage interval right now so I don't know that it would do much good.
I did this back on my old TL-S and found that the factory MID's recommendations for oil changes was almost dead on with how often I should change the oil (I believe that car was 5500 miles). If I drove my car more I would do this but frankly I am hitting the time interval on oil changes before the mileage interval right now so I don't know that it would do much good.
#4
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Kinda like a humans getting blood tests tracking cholesterol etc.
Taking random samples at infrequent intervals and not having a base line to compare them to is of little or no value.
The OEM oil change interval is conservative enough to eliminate the possibility of 'wearing out' the oil for 99% of drivers.
#5
Oil analysis has great value when performed on fleet vehicles that are constantly on the road. The idea is to take frequent samples from each and create an individual trend line. As the engine wears over tens or hundreds of thousands of miles or the health of the oil declines due to extended change intervals, any unusual changes in the trend can signal the need for an oil change or the need for engine maintenance.
Kinda like a humans getting blood tests tracking cholesterol etc.
Taking random samples at infrequent intervals and not having a base line to compare them to is of little or no value.
The OEM oil change interval is conservative enough to eliminate the possibility of 'wearing out' the oil for 99% of drivers.
Kinda like a humans getting blood tests tracking cholesterol etc.
Taking random samples at infrequent intervals and not having a base line to compare them to is of little or no value.
The OEM oil change interval is conservative enough to eliminate the possibility of 'wearing out' the oil for 99% of drivers.
It would be nice if more people with the supercharged V8 did some analysis work so we could get an overall average going.
#6
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#8
I used the drain plug on this change, and will continue to do so. The previous owner always took it to Jaguar where they most likely used the pump.
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DPK (01-13-2016)
#9
I be willing to bet, next time you drain it and have it checked, it won't be near as bad as this last time.
#10
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That all sounds plausible, but does having a fine layer of heavy metal particles on the bottom of the sump pan really have potential to cause a problem? In other words, do these particles settle and stay down the bottom of the pan and never circulate through the engine, or do they get stirred up and circulate? (PS - I don't have a pump and both oil changes I did on my old XFS I used the drain plug).
#11
That all sounds plausible, but does having a fine layer of heavy metal particles on the bottom of the sump pan really have potential to cause a problem? In other words, do these particles settle and stay down the bottom of the pan and never circulate through the engine, or do they get stirred up and circulate? (PS - I don't have a pump and both oil changes I did on my old XFS I used the drain plug).
#12
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That all sounds plausible, but does having a fine layer of heavy metal particles on the bottom of the sump pan really have potential to cause a problem? In other words, do these particles settle and stay down the bottom of the pan and never circulate through the engine, or do they get stirred up and circulate? (PS - I don't have a pump and both oil changes I did on my old XFS I used the drain plug).
It's standard practice to take an oil sample shortly after the engine has been run just to make sure that the contents of the system are 'stirred up' and not stratified in any way.
This means the method of extraction is irrelevant.
#13
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The really nasty chunks stay put. The less nasty stuff gets caught in the filter. Neither is related to the purpose of oil sampling which looks for three things
1) changing trace levels of engine 'bill of material'
2) contamination from outside sources- coolant, water, fuel, dust
3) chemical deterioration of the oil and it's additives from overheating, short drives, high mileage etc.
Theoretically the oil sitting for a while could stratify slightly, so it's common practice to take samples consistently. The easiest way is to do this is pull a sample right after the engine is shut down and before any fresh oil is added as a top up.
1) changing trace levels of engine 'bill of material'
2) contamination from outside sources- coolant, water, fuel, dust
3) chemical deterioration of the oil and it's additives from overheating, short drives, high mileage etc.
Theoretically the oil sitting for a while could stratify slightly, so it's common practice to take samples consistently. The easiest way is to do this is pull a sample right after the engine is shut down and before any fresh oil is added as a top up.
#16
Ah-Ha!! Awesome information reaffirming my suspicions. This one time you had it analyzed after you drained it via drain plug..means there were high concentrations on the bottom of the pan and you got them all in the last drain..making the analysis seem heavy on the metal particulates because it never has been drained like that before.
I be willing to bet, next time you drain it and have it checked, it won't be near as bad as this last time.
I be willing to bet, next time you drain it and have it checked, it won't be near as bad as this last time.
That can make a large difference and can be used either way on this argument.
#17
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Just remember I have NO IDEA where that sample was taken during the drain process because I forgot to take the sample while draining so I picked up one of my bottles with the used oil and dropped it off at their shop.
That can make a large difference and can be used either way on this argument.
That can make a large difference and can be used either way on this argument.
#18
Again the next analysis will be a much better indication.
#19
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That's not the metal that's suspended in the oil, making it past the filter and circulating through the engine where it might do harm.
#20
Just to clear up any confusion, this is from Blackstone Labs:
Does it matter if I take my sample at the beginning, middle, or end of the drain? I forgot this time and didn't get the sample till almost all the oil had drained out. Is that why metals went up?
I doesn't really matter. The optimal time is the middle of the drain, but the oil really does a good job holding everything in suspension. We don't suggest the beginning because there might be a little dirt around the drain plug. We don't suggest the end just because you might run out of oil and not have enough to fill the container. But if you catch the beginning or end, it doesn't usually make a difference in wear. Just let us know on the oil slip when you send it in.
I doesn't really matter. The optimal time is the middle of the drain, but the oil really does a good job holding everything in suspension. We don't suggest the beginning because there might be a little dirt around the drain plug. We don't suggest the end just because you might run out of oil and not have enough to fill the container. But if you catch the beginning or end, it doesn't usually make a difference in wear. Just let us know on the oil slip when you send it in.
Well, when I took the sample this time, I forgot to catch it as it was coming out, so I had to dip my sample out of the drain pan. Is that okay?
Depends. Was the pan mostly clean?
No, it had a bunch of oil in it already from about 15 other oil changes.
Then no, don't send it in. Your sample will be contaminated.
Depends. Was the pan mostly clean?
No, it had a bunch of oil in it already from about 15 other oil changes.
Then no, don't send it in. Your sample will be contaminated.
Last edited by WRXtranceformed; 01-16-2016 at 08:17 AM.
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Mikey (01-16-2016)
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