2006-08-18 08:58:56 · 23 answers · asked by zxgirl04 1 in Cars & Transportation ➔ Maintenance & Repairs
10w40 is thicker and is better to use in the summer 10w30 is better in the winter
2006-08-18 17:23:07 · answer #1 · answered by nikki m 1 · 1⤊ 1⤋
10w30 is lighter then 10w40. for older cars people use 10w40 because it sticks to the engine parts longer and better. however in the winter time its best to use 10w30 because its lighter it won't take as long to get it going around the engine when its cold liquid gets thicker.
2006-08-18 09:05:36 · answer #2 · answered by Jeff L 4 · 0⤊ 0⤋
Multi-weight motor oils are made with a thin base oil (the lower number) for good lubrication at low temperatures.
They include polymers (long chain hydrocarbons) which make the oil act as if it had a higher viscosity when the temperature increases.
A 10W-30 has the lubrication qualities of a straight 30 weight oil at high operating temperatures.
A 10W-40 oil appears like a straight 40 weight oil at high temps.
They both act like a thin 10 weight oil when it is cold. This lets the engine start up faster, and the oil circulate better and lubricate better in the tighter manufacturing tolerances that modern engines are designed to.
2006-08-18 10:06:48 · answer #3 · answered by Tom-SJ 6 · 0⤊ 0⤋
Difference Between 10w 30 And 10w 40
2017-01-13 14:38:37 · answer #4 · answered by ? 4 · 0⤊ 0⤋
The last numbers (30 or 40) designate the viscosity of the oil when cold. The 10W-40 is thicker when cold. It depends on your climate, but there is not a huge difference between the two. If you get very cold weather (10º or colder) I would use the 10W-30. If you have very hot weather (90º or hotter) I would go with the 10W-40
2006-08-18 09:28:14 · answer #5 · answered by united9198 7 · 0⤊ 0⤋
there is a difference in the fact the oil retails its thickness (viscosity) at different temperatures. so 10w40 allows the car to run at lower (freezing) temperature. It is also the same of the temperatures at the higher end of the scale, the oil retains its thickness at high temps without breaking down the molecules
2006-08-18 09:07:06 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Yes. 10w30 is thinner than than the 10w40. 10w30 is mostly used new cars.
2006-08-18 09:06:53 · answer #7 · answered by juan m 1 · 0⤊ 0⤋
10w30 is for new cars and 10w40 for cars that have more miles obviously 10w40 is more thicker
2006-08-18 09:07:07 · answer #8 · answered by ella? 2 · 0⤊ 0⤋
The 10w40 will stand up longer in hot weather.
2006-08-18 09:03:21 · answer #9 · answered by jewingengleman 4 · 0⤊ 0⤋
10w30 is slighly thinner for colder temperatures, and 10w40 is slightly thicker for hotter temps.
2006-08-18 09:02:39 · answer #10 · answered by mongo862001 5 · 1⤊ 0⤋