code:Well, this new post is a kind of "summation" from the questions I've been asking lately...I think I've found an oil to take the place of Long-Life 15w-40 in my truck! For reference, engine is a high mileage TBI GM 4.3L V6 that is, at least internally, very clean. OCI's will be no more than 4,000 miles. Looks like a pretty darn good oil, and something that might help reduce my blue-smoke startup issues as well as keep consumption low. So what do my BiTOG "buds" think about the high-mileage 10w-40?Pennzoil High-Mileage 10w-40 Pennzoil Long-Life 15w-40 Viscosity: @40°C, cSt 109.4 118 @100°C, cSt 15.50 15.8 Pour Point, °C(°F) -30(-22) -33(-27) Viscosity Index 149 136 Low Temperature Viscosity cP at Temperature (°C) <7,000@-25 6,400@-20 HT/HS 3.93 4.3