I was always a Castrol man for dino & M1 for synthetic. After being on this site, I have changed to be cheap for dino on my beater "get me to work" vehicle, Pennzoil as default dino for nicer cars & recommended to friends & family. However, with this new "open mind", my non-dd vehicle which I care more about had gotten M1 for the last 8 yrs but I am gonna switch it for experimentation. I have been wanting to try a cheaper oil as well as experiment with something that will not burn off at the same rate as M1 or M1 HM does in this particular vehicle. With my new love for Pennzoil products, and my old love for Castrol products, I was going to get one of those brands HM dino oil. BUT, I want at least a blend since this is a vehicle that is retired and driven on weekends & to haul stuff, etc. MY only real choice in a synthetic or blend HM oil seems to be Valvoline or M1. Since I am wanting to try something other than M1 Hm, then my only choice is maxlife and I am going to use the blend 10w30. I have never been a valvoline man but you guys finally convinced me that it is a good oil. I still like the Pennzoil HM dino oil for my daily driver when I find a good price, but in this other beast it will be getting maxlife on its next change once or twice per year depending on how much I drive it and what the burn-off looks like as compared to M1. I just wanted to share this story with all of you avid Valvoline fans because I get a weird feeling in my stomach by using their products alsmot as if a guy who drive Chevy all his life but decides to buy a Ford Crown Vic since the Caprice was cancelled LOL.