I used Havoline in my Hyundai until I bought 84 quarts of T/A syn-blend at Dollar Tree prior to Katrina. I can't say I noticed any difference in how they poured (in both cases, 10W-30), but, then, I wasn't paying any particular attention, either. I'm on my second run with the TropArtic and will submit a UOA sample when it's drained out. I'm debating with myself whether to actually extend my usual 3,000 mile OCI on this run to 6,000 miles. (But doing so would mean not getting around to a drain for another year at the rate I don't put miles on...) I've suspected that the ConocoPhillips brands (TropArtic, 76, Kendall, & Conoco) are the same brew under different labeling. (what minor differences show up in the respective PDSs could easily be accounted by different production run samples being tested) Motorcraft is the joker - ConocoPhillips won't confirm that it's the same formula, but UOAs show very obvious similarities to ConocoPhillips own brands - at least what few have been submitted to date. If Motorcraft ain't a clone, then I consider it a kissin' cousin bred from twin parents (twin brothers marying twin sisters) of the others in the family until proved otherwise...