2006-06-24 07:29:07 · 5 answers · asked by Anonymous in Cars & Transportation ➔ Maintenance & Repairs
With any multi viscosity oils the first # represent the viscosity(thickness) at start up temp. The second # represents the viscosity at operating temp. The smaller the # the less the viscosity. So a 10w30 starts at a 10 weight and turns into a 30 weight. The 10w40 starts at a 10 weight and turns into a 40 weight. the w stand for winter. Most people use multi viscosity oils. While some don't likel them they opt to use a SAE30 (straight 30). It is 30 weight all the time. But in most areas in the U.S you should use a multi viscosity oil.
2006-06-24 14:18:14 · answer #1 · answered by rwings8215 5 · 0⤊ 0⤋
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HEY Super lady, I personally perfer 10-40 If for some reason someone has told you that you need a thicker oil , then I'd use a 20-40 Go to your owner's manual and look to see what the viscosity of recomended oil would be! "BRILLIANT"!!!!
2016-04-03 12:04:54 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The viscosity index of the oil at high temperature. The 10w40 will be thicker at high temperature.
You should use whatever grade and VI as recommended by the manufacturer.
2006-06-24 07:32:48 · answer #3 · answered by Bostonian In MO 7 · 0⤊ 0⤋
All good answers.
BTW: "viscosity" is resistance to flow. Water has very low viscosity, whereas tar has very high viscosity
2006-06-24 14:59:06 · answer #4 · answered by d_cider1 6 · 0⤊ 0⤋
thickness...one works better in cold weather while the other works better in warm weather. I don't remember which is which though.
2006-06-24 07:34:28 · answer #5 · answered by maniaajo 3 · 0⤊ 0⤋