- Mar 11, 2007
Yes, the low 0 starting weight will help the car start better on days so cold you wouldn't feel like being outside.0-40 is fine to use, it is better over an even wider temp range i think,, i`m sure oilman will be here soon to explain,
If you are using true synthetic, the starting weight doesn't matter that much, especially this time of year. You could use 20w-50 and the car would start fine. Ideally, you want your multi-viscosity oil to have the lowest distance between the first number and the second one while still being able to start the car and protect at temperatures. This is because for a wider range viscosity oil there are more polymer additives to make up that range, meaning less oil in the mix doing it's job.