Originally Posted By: mwball0
Originally Posted By: Tucson Five-O
mwball0,
I'm answering your comment to my Cruze's UOA back in your thread.
If you're going to go by your OLM next time (if I read your comments correctly, you were 800 miles past 0%, roughly +10%), then QSUD will probably have a similar end of OCI TBN of 1.7.
If you run another slightly extended OCI in your colder climate, I would stay with PP. It has about 200ppm more Calcium. QSUD would probably end up with a 1.4 TBN in an extended run which may be lower than you're comfortable with.
I am curious (and somewhat skeptical) about your 15 value for manganese. Usually only see readings of 0 or 1 in a port injected engine.
Did you do a lot of cold weather idling during warmup? I know you had a brutal, old-fashioned winter back there.
I wouldn't change oils yet.
Gary
Yes we had a terrible winter hear but I really didn't do to much cold weather idling. I park in a heated garage overnight and don't waste gas worming up the car after work.Not sure about the manganese myself. I normally would not run past the OLM, I had about 10% left on it last month when we were going on a trip to Va Beach. Thought I would push it a little and wait till I got back to change the oil.
Thanks for the input!
Actually I must have really been distracted when entering the data! Your question prompted me to go back and take a second look at my test results. Manganese is not even listed on it so I don't know how I transposed 15 onto the template.
Sorry about that....