I would like some advice on selecting a cold weather oil for my Olds 307 V8 in my old Delta 88. The car has been using 10W30 Pennzoil dino for a long time now. This past winter the temps got into the -30F range, which I think is pretty well the limit for the 10W30. I think next winter I should use an oil that has better cold flow properties to help reduce start-up wear. I was thinking of switching to Pennzoil 5W30 HM oil, but I checked the specs on Pennzoil's site, and the pour point is the warmer than the standard 10W30 Pennzoil?? I also checked the synthetic blend and the 5W30 has the same pour point as the 10W30 dino?? Pennzoil dino specs http://www.pennzoil.com/penn/products/car_truck/pdfs/motor_oil/Multigrade.pdf Pennzoil HM http://www.pennzoil.com/penn/products/car_truck/pdfs/motor_oil/HighMileageVehicle.pdf Pennzoil Blend http://www.pennzoil.com/penn/products/car_truck/pdfs/motor_oil/SyntheticBlendMotorOil2.PDF The standard Pennzoil 5W30 has a very low pour point, but I am not sure how well it will hold up in my driving conditions. The car is used for shorter trips during winter, and obviously sees more idle time. I want an oil that will stand up to shearing and also have good cold weather pumpability. My owners manual, doesn't recommend 5W30 for temps above 60F, so I don't want to run this grade year round. Oh and yes, I do use an engine heater; they are a necessity in this area. Any suggestions on what I should run in the winter and the rest of the year. I usually have very short intervals over the winter months (better safe than sorry). I am open to other oils as well, as long as they are cheaper. I have used Pennzoil with success for several years which is why I used their info. I don't want to use fully synthtic, as the cost is too high for my old Oldsmobile.