Gonna do a long term experiment on mobile1 15w50. Temp range where I live goes from -10f to 100f. Gonna use 2 vehicles. A 2001 k1500 4.8l automatic. 205k on it. No cats. No egr. No knock detector. Known cam lobe wear. I forget which one but it was for cyl 7 or 8. Absolute beater of a truck. Was...
