quote:
Originally posted by chinee:
TooSlick, ex_MGB... thanks. Both of your responses were quite interesting.
But a question... running the oil too long? Is this indicated by the low TBN.. a low TBN indicates acidity?
I thought many conventional oils provided protection past the "old" standard of 3,000 miles. Is this not true in my case?
TooSlick... I'm still not fully functional with the oil lingo, can you translate and suggest a few over the counter oils, both dino and synth, based on your recommendation to use "ACEA A3/B4" and "ASTM D-4739". What do these terms mean?
I also bought a case of 12qts of the Clean 5000. I hate to waste... would anyone recommend mixing with Mobil 1 to improve the oil make up? If so I will use in my 4.7L V8 Toyota as well as the Infiniti. I've been using M1 10W30, 8-10K mile ODIs in the Toyota and the results have always been solid.
Chinee:
Just return the Mobil Clean 5000; if you are unable to, just keep it around, you'll find uses for it.
I have to respectfully disagree with Ted about the lower limits that he uses for TBN. Ted does not feel comfortable running the oil's TBN level below 2.0 on the D-4739 scale, or 4.0 on the D-2896 or Dexil scales. However, I disagree and I personally use a lower limit of 1.0 on the D-4739 scale and a lower limit of 3.0 on the D-2896 or Dexil scales.
See Terry's post in this thread.
The D-4739 scale is a method used by Blackstone to measure TBN levels, it often produces a more conservative reading that reads about 1.5-2 points lower than a TBN measured using the D-2896 or Dexil methods.
Most conventionals are good for past 3,000 miles, but simply depends on the application. I personally don't understand why you're depleting the TBN so rapidly in this case, are you doing MANY short trips??? Some engines can just be hard on oil, and I suspect that this one may be of them and the silicon is a contributing factor???
ACEA A3/B3: I'm not that familiar with this spec. However, this spec generally applies to oils that have a High Temperature/High Shear (HT/HS) score of >3.5 and I believe also has to meet certain standards for volatiliy. Often times, this tends to attract those oils that are at least of a borderline 30wt/40wt viscosity.
I'd like to see the new GC 0w-30 to be used in this application.
On a side note, I also think that it wouldn't be a bad idea for you at this point to consider paying Terry for an interpretation when you do your next analysis.
Michael