Looking for a 40 wt oil to put in my 383 stroker for the next oil change. Have 0w-30 GC in right now, but think a 40 wt might be a better option. Redline 5w-40 has been suggested, but I thought I'd ask what everybody's opinion is on the Amsoil 10w-40 Synthetic high performance. Temps never get below 30*F in the winter, and temps stay 85*-105* in the summer. I'm also having consumption issues with the GC. I'm not partial to one brand and I dont mind ordering it, although I'd prefer to find something OTC. Truck is driven every day, has a 6 qt. cap. and runs the stock tow package oil cooler on the side of the radiator.