My 2005 Dodge Grand Caravan (3.8 v6) has 23000 miles on it. I have been running Havoline 5W/20 with 4-5K OCI's. I had been experiencing an oil consumption problem. My last OCI was at 20k. After about 1300 miles, I had used about a half quart of oil. I topped it off. 2000 miles later, I had used almost a quart. The last 1000 miles was spent pulling a camper along with some mountain driving. Today, I changed oil and filter (Wix 51085) and TropArtic 5W/30 synthetic blend. I noticed immediately that the engine ran much quieter. I wonder if I would have gotten the same results with Havoline 5W/30 (???). I will watch the oil consumption with TA and see what happens. I will probably try Havoline 5W/30 on my next OC and see if I get the same results. Havo-liners, please don't think I'm knocking Havoline. I have used it for years and since being introduced to BITOG, I've confirmed that Havoline is a good oil. Perhaps my motor just doesn't like it. Anyway, we will revisit this subject in a few weeks after I have some mileage on the TropArtic.