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I think BrianA is using the same company (http://www.oillab.com/) I did when I ran tests on my oil. I had to pay extra for the TBN test. At 15,000 miles my Mobil 1 Tri-Syn sample had a TBN of 2.XX. I haven't called them yet to find out what this means yet. It seems pretty low whatever it means.
I just got off the phone with the oil lab and they told me my oil was unacceptable because of the TBN level. Mobil 1 Tri-Syn starts out at 12 and the longer you use it the TBN numbers go down which means the acid goes up. For Mobil 1 a TBN of 5 or so is acceptable but at 15,000 miles mine was 2.XX. This will cause pitting in the softer metals of the engine. Live and learn........
I don't know. Every 5000 miles I took a sample and sent it in for testing. At that time I did not know about TBN so I did not have it tested until 15,000. Since I did not know about the acid level I pretty much screwed up my tests.
Greenpus,
Interesting info on the TBN for Mobile 1. The topic has strayed from Quaker State to your M1 TBN numbers. I hate your info is buried in this thread.....
I'm left to wonder...is the low TBN after 15,000 miles a reflection of your engine or the M1? You might not have the answer, but what is your gut feeling? Your information ties in handily with the conventional-vs-synthetic debate, and I'd like to have more information or opinion.
As always, Thanks,
Brian A
I copied the TBN discussion to a new thread if anyone wishes to pick up the discussion there. Good discussion on TBN here deserving a topic of it's own. Thanks to Brian for giving me the idea!
We shouldn't even have threads in this forum, because everybody reads everything anyway, and what's said in one carries into another, and then we can't remember which thread we were discussing what in. I love this forum, so we need to unify it to save everyone the hassle of going to multiple threads, just an idea....
'77 F100, 302 (the aftermarket Prodigy), C4
Cadet Second Lieutenant John F. Daly III
South Carolina Corps of Cadets, The Citadel
The TorqueKing
TK, are you saying it was good to separate the topics, or just makes it more confusing having the same info in two threads?
Or maybe you are suggesting we assimilate all and become one with the collective...
TK, prepare to be assimilated
I was just thinking about how nice it would be to just have one extremely long thread, instead of scattering our opinions in different threads. For instance, there is wonderful Mobil-1 data in the Quaker State thread, and since most of us end up reading everything anyway, we outta just have a "common area" amongst oil forum subscribers, so we don't keep forgetting which thread we were talking to who about and soforth. Maybe it's a bad idea, but that's why I design concrete, asphalt, and structures, and one day hopefully aircraft and automobiles, but not web sites. very interesting stuff to read though, I really enjoy this forum.
I use Castrol GTX in my '78 F-100, currently has 216,000 miles and change it every 3,000 miles. However, I use Quaker State in my 2000 Cherokee Sport 4.0 inline six with 53,000 miles, no problem and put 183,000 miles on a Dodge Shadow using strictly Quaker State 10W30, no engine problems. I think changing the oil every 3,000 miles made these engines last more that what brand. Just my 2 cents worth.