Alegator

I have a 2007 GMC Yukon XLT with the 5.3 L V-8. It has 153,000 miles on it. For the past seven years or so, when traveling on down the interstate at about 60 or 65 miles an hour the oil pressure needle sat right on top of the zero of the 40 psi printed on the oil pressure gauge. For the past couple of years I have watched the oil pressure needle ever so slowly moved to the left and when doing 60 or 65. It now hung out right in the middle of the four. I attributed this to the normal wear and tear on the engine and was okay with it. Then I had to help my son moved from Florida to Chicago. Among other things I did an oil and filter change to get ready for the trip. I put in mobile super synthetic 5W – 30 motor oil. On the trip south from Kentucky to Florida, running pretty empty, the oil pressure hung out just below the four on the oil pressure gauge when doing 60 or 65. Coming back north we had a serious load on, the Yukon was full, there were things tied on the roof, and we were hauling U-Haul’s largest double axel trailer. The trailer was quite heavy as we had a 13 kW gasoline generator loaded into it and the trailer was packed to the ceiling. On the northbound trip which was in June I noticed that the oil pressure at 60 miles an hour was a bit lower than before and by the time the trip was done the oil pressure was well to the left of the 40 on the oil pressure gauge when doing 60 miles per hour.. I understand those gauges are not the most accurate things in the world that’s why I did not quote actual PSI readings. But, as the needle moves slowly to the left when I’m doing the same road speed it does indicate a loss of oil pressure. And when idling it went well to the left into territory it had never been before. Now here comes the magic part. Three weeks ago as I was getting the Yukon ready for a 2000 mile road trip towing a 2 axel trailer with antique vehicle on it for a combined weight of 5500 pounds. So I did my usual changing of the oil and the oil filter. This time I used Castrol with Fluid Titanium at the usual 5W – 30 oil weight. When I started the engine up the oil pressure needle moved well to the right of the 40 on the oil pressure gauge even though the engine was idling. On the interstate doing my usual 60 or 65 miles an hour the oil pressure gauge hung out right in the middle of the zero of the 40 on the oil pressure gauge. It hasn’t done that since the engine was new. When I bought the Castrol oil with titanium I figured that was just a marketing gimmick. But after seeing the increase in oil pressure at all engine rpm’s I just had to understand why. So I went on the Castrol oil website did a bunch of research on their titanium line of oils and come to find out they have found a way to increase the surface tension of the oil, therefore it does not squeeze out between the bearings and all the other parts as readily as other oils.. Has anybody else had the same increase in oil pressure when using the Castrol oil edge fluid titanium technology? Thanks, Al