Is 5w30 oil thicker than 10w30?
A higher viscosity oil, such as 10w30, will flow slower at low temperatures compared to a lower viscosity oil like 5w30. A higher viscosity or thicker oil will seal better than a low viscosity oil. A thicker oil will also provide better lubrication of critical engine parts.
Multi-grade oils could stay as close to the optimum viscosity over a range of temperatures - not too thick when it is cold and not too thin when it is hot. The difference between 10W-30 and a 10W-40 is the high temperature viscosity. Obviously, a 10W-40 is thicker than a 10W-30 at high temperature.
- The W actually stands for "winter" but basically means "viscosity when cold." So 10W-40 oil acts like SAE 10 oil when it's cold, but acts like SAE 40 oil when it's hot. 0W-20 oil acts like SAE 0 oil when it's cold, but acts like SAE 20 oil when it's hot. Motor oil.
- The 11 viscosity grades are 0W, 5W, 10W, 15W, 20W, 25W, 20, 30, 40, 50, and 60. These numbers are often referred to as the "weight" of a motor oil, and single-grade motor oils are often called "straight-weight" oils.
- The lower the "W" number the better the oil's cold temperature/cold start performance. The 40 in a 10w-40 simply means that the oil must fall within certain viscosity limits at 100°C. Once again the lower the number, the thinner the oil: a 30 oil is thinner than a 40 oil at 100°C etc.
It heavily depends on which oil you are asking about. If it crude oil then the number is 7.2 lbs/gal +/- .2 or so according to it's API and contaminants.
- It heavily depends on which oil you are asking about. If it crude oil then the number is 7.2 lbs/gal +/- .2 or so according to it's API and contaminants.
- Hi Sofie, According to WikiAnswers a US gallon of fresh water at 4 degrees C weighs 8.34 pounds.
- They both weigh the same as it's measured by weight. However, if you change the question to Which weighs more, a gallon of water or a gallon of gasoline, the answer gets a bit trickier. While a gallon of gasoline weighs 6.2 lbs, a gallon of water weighs heavier at 8.33 lbs.
10w30 vs 10w40 – Differences in Engine Oil Viscosity. The difference between 10w30 and 10w40 is the thickness of the oil at operating/high temperatures, at which 10w40 is thicker than 10w30.
- 10w30 vs 10w40 – Differences in Engine Oil Viscosity. The difference between 10w30 and 10w40 is the thickness of the oil at operating/high temperatures, at which 10w40 is thicker than 10w30.
- The 'w' means winter, implying the viscosity at which the oil will flow when the car is starting or at low temperatures. The 5w30 oil will flow better at low temperatures than the 10w40 oil. At high temperatures, the 5w30 oil is thinner than that of 10w40 since 30 is lower than 40.
- The SAE designation for multi-grade oils includes two viscosity grades; for example, 10W-30 designates a common multi-grade oil. The first number '10W' is the viscosity of the oil at cold temperature and the second number is the viscosity at 100 °C (212 °F).
Updated: 4th October 2019