Blackstone Laboratories' Oil Analysis
#16
Rennlist Member
Great information on the Oil Analysis process so far.
Does anyone use the Blackstone TBN (total base number) test to measure the amount of active additive left in a sample of oil?
I thought the TBN might be useful for people who want to extend their oil usage beyond the normal range of 3,000 to 5,000 miles.
I currently use Mobil1 5W-50 and would like to safely extend to 7,500 miles.
http://www.blackstone-labs.com/do-i-need-a-tbn.php
Does anyone use the Blackstone TBN (total base number) test to measure the amount of active additive left in a sample of oil?
I thought the TBN might be useful for people who want to extend their oil usage beyond the normal range of 3,000 to 5,000 miles.
I currently use Mobil1 5W-50 and would like to safely extend to 7,500 miles.
http://www.blackstone-labs.com/do-i-need-a-tbn.php
#17
Agent Orange
Rennlist Member
Rennlist Member
Sent a sample to Blackstone Labs last week after I changed the oil. I had ~2800 miles on the oil and about 1.5 years. That was on Mobil 1 15W-50. I switched to Brad Pitt and the plan is to send them a sample of that next winter and depending on what the results are I'll decide if I want to change the oil or just run it for one more season.
#18
Burning Brakes
Sent a sample to Blackstone Labs last week after I changed the oil. I had ~2800 miles on the oil and about 1.5 years. That was on Mobil 1 15W-50. I switched to Brad Pitt and the plan is to send them a sample of that next winter and depending on what the results are I'll decide if I want to change the oil or just run it for one more season.
#21
Rennlist Member
This is very similar to a program we have in the Army. I figure if it is good enough to manage oil in our Aircraft engines it is good enough for my Porsche. I do the TBN as extending the life of the oil is one of my prime objectives.
--Joe
--Joe
#22
Burning Brakes
Now on the topic of oil changes, I had an oil change done in October with Brad Penn, and I put about 4oo miles on it before storing the car for the winter. I am about to get the car going this week. Without doing an oil analysis do you think I am good as far as the oil is concerned or would the majority change it anyways?
#25
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Ilko, your report looks good. Keep doing 'em.
Keep in mind, you will most likely not see the entire benefit (or detriment) of one oil change, when switching brands & viscosities. It take 2-3 changes for the entire system to show the true light.
Keep in mind, you will most likely not see the entire benefit (or detriment) of one oil change, when switching brands & viscosities. It take 2-3 changes for the entire system to show the true light.
#26
Nordschleife Master
#27
Three Wheelin'
Sent a sample to Blackstone Labs last week after I changed the oil. I had ~2800 miles on the oil and about 1.5 years.
#28
Agent Orange
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That's an interesting data point as I've always felt that syn oils can last well past a year if the mileage is low. From the looks of your experience two years and 4,000 miles between changes is not unreasonable. I'll probably still change once a year but it's nice to know I can be late without much worry.
I'm not sure if the same thing applies for the "green oil," that's why I was planning on taking a sample in the fall before putting the car away for the winter. Based on the results I'll decide whether to change the oil next spring or wait a little longer.
#29
Nordschleife Master
#30
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FlatSix911, nice report. Thanks for sharing. Given the elevated numbers for copper, I'd not extend the interval, if it were my Porsche. Your next report will tell you more info, this is just your baseline.
For comparison, the copper in my last report for the:
Boxster S- 8ppm. Approx 36,000 miles. Red Line 5W40.
993 Turbo- 6ppm. Approx 45,000 miles. Mobil V-Twin 20W50.
For comparison, the copper in my last report for the:
Boxster S- 8ppm. Approx 36,000 miles. Red Line 5W40.
993 Turbo- 6ppm. Approx 45,000 miles. Mobil V-Twin 20W50.