2007-01-20 08:17:05 · 4 answers · asked by stacypeacock1967 3 in Cars & Transportation ➔ Maintenance & Repairs
The viscosity range. The 10 40 oil has 10 viscosity at low temperature and 40 viscosity at high temperatures. You can extrapolate for the other.
2007-01-20 08:21:12 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The latter is thicker. It will offer more protection at higher engine operting temperatures but make the car more difficult to start in cold weather. Unless you have a turbocharger on the engine, forget the 20W-50. You don't need it and it will cost you more.
2007-01-20 12:44:07 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The W stands for winter. Using heavy oil in an older engine will cause it to use MORE oil, not less As stated, the first number is viscosiyy of COLD oil the second hot oiil.
2007-01-20 10:56:54 · answer #3 · answered by tronary 7 · 0⤊ 0⤋
the higher the number the thicker the oil will be the first # is the thickness when the oil is warmed up to engine operating temp, The second # is the thickness when the oil is cold.
If you have an old engine with a lot of miles on it you can use thicker oil.
2007-01-20 08:21:53 · answer #4 · answered by Anonymous · 1⤊ 1⤋