Originally Posted By: 21Rouge
Built_Well must go where no man has gone before i.e two consecutive runs of RLI 0W30 with a UOA for each.
RI_RS4 has done many consecutive UOAs of Bio-Syn. Of course, he tested the 40-weight oil, not this 30-weight.
I hope RI_RS4, the champion of Bio-Syn on this forum, steps in with his own analysis of my UOA.
I already know I'm not going to use this 30-weight Bio-Syn in the future because the TAN : TBN ratio of 8.5 to 2.0 makes a novice like me uneasy. I really wasn't expecting anything more than a ratio of 5 : 3 at the worst.
Do I like the oil. Sure, I like it. My engine has never sounded quieter and smoother, but once I reach 3,000 or 4,000 miles on this second fill of Bio-Syn, I will have to say goodbye.
If some of you want me to keep the oil in to 5,000 miles and get another UOA, you'll have to pay for the UOA, because I already know this oil is not for me.