Whats the diffrents between 5w and 10w motor oil?

on engineWhats the diffrents between 5w and 10w motor oil?
10w is a little thicker than the 5w.Whats the diffrents between 5w and 10w motor oil?
W stands for viscosity in winter conditions.





also the higher the W number the more resistant it is to shearing (parts squish the oil away causing metal on metal and loosing viscosity)


go by the car make for viscosity rating, i like 10W30 synthetic for hard driving and long trips, and 5w30 for cold whether and short trips.


SAE 30 (30w30) is the best for shearing but should never be used when cold out.
5 w lol....standard for a long time [and even now] is 10 w 30...the 1st # tells how it flows ... for summer 80 ,,,90 degree i use 20 w...very thick...new cars use 5 w even 0w for less friction to gain a fraction of a % for fleet mileage.......the 2nd number is how tough it is...there i use 40 even 50 ...but most use 30 because its cheaper....
the first number is how heavy the oil is when it,s cold and the last number is the weight of the oil when it,s warmed up.
the viscosity rating in cold temp,oil with more than a 20 differential between rates is a synthetic blend. 10W30 not syn. unless specified , 5W30 syn. blend
the difference is the viscosity


10w would be thicker than 5w
Viscosity when cold.


10 is thicker than 5