5W20 versus 5W30

Messages
79
Location
VA
Overheard this conversation in a waiting room the other day. Lets use Mobil 1 for an example and lets say it is 20 degrees fahrenheit outside. Would the 5W20 and 5w30 flow the same at start up? I guess the same could be asked of the Mobil 1 AFE line. Does the AFE 0W20 and 0W30 flow the same as well?
 
Messages
1,114
Location
Muncie, Indiana
0W only really shines when it's like -30 out, the only real benefit to a 0W oil is it should be thin enough to pump in very cold climates without the need for a block heater. In most of the US except maybe a few parts up close to the Canadian border, 0W is widely unnecessary.
 
Messages
35,270
Location
NY
At 20F I'd take the 5W30. It will work just as well as the 5W20 at 20F, and offer better protection in extreme heat, or if my engine starts to overheat for whatever the reason.
 
Messages
170
Location
Carson City
Overheard this conversation in a waiting room the other day. Lets use Mobil 1 for an example and lets say it is 20 degrees fahrenheit outside. Would the 5W20 and 5w30 flow the same at start up? I guess the same could be asked of the Mobil 1 AFE line. Does the AFE 0W20 and 0W30 flow the same as well?
Since you mentioned AFE 0W20 and 0W30 here is the viscosity difference between those 2 oils.
AFE.jpg
 
Top