This is just for conversation. I am not an expert, just thinking and wondering about a few things. My vehicle specs VW 502. I use M1 0w40, as I feel it's a fantastic choice and pretty easy to find. From what I know and have read, VW is not the hardest spec to meet. In a lot of cases, non 502 oils that are a3/b3 rated or HDEO show as good or better results. The biggest thing is the hths of 3.5 or higher. T6, TDT are good examples of non 502 oils that show good UOAs, even in the VW engines that are tough on oil. So, my question is this. Wouldn't a blend like T5 work well also? HTHS should be greater than 3.5 based on some of the specs it meets, it should have a nice add pack since it's an HDEO, and it's got a nice TBN. If one were to change it at say, 7.5k of normal driving, wouldn't it seem to work well? Cast aside any warranty talk. I'm just creating some conversation here. I guess I am especially interested since I know my 2.5L is pretty easy on oil with a 6.3 quart sump. Interested in thoughts.