2006-08-07 06:51:54 · 5 answers · asked by silverfox 1 in Cars & Transportation ➔ Maintenance & Repairs
Yes, the thicker the viscosity the higher the pressure. When it is hot the pressure difference between the two oil weights will be reduced though.
2006-08-07 06:55:36 · answer #1 · answered by Cybeq 5 · 0⤊ 0⤋
It should the higher the number the thicker the viscosity of the oil. So if its thicker it takes greater pressure to pump it. A good move when the weather is hot to have a sturdier oil. virtually all diesel engines recommend 15w 40 because of the greater heat of the engine.
2006-08-07 06:58:01 · answer #2 · answered by southforty1961 3 · 0⤊ 0⤋
30 and 40 are the weights of the oil. However the lower the number the heaver the oil, and heavy oil will normally need to be hotter to run thin. Most small cars use heavy oil due to it is harder to break down the lubricants, but they also remove more heat from the engine.
2006-08-07 07:51:57 · answer #3 · answered by wmkinger 2 · 0⤊ 0⤋
Not enough to see with your Gage unless you are driving through Death Valley, or something! The thing that is rated here is how well it could take "hammering", for lack of a better term. This is pretty important in protecting you crankshaft and such, but the difference isn't what I would call visually noticeable.
2006-08-07 07:00:41 · answer #4 · answered by Gary Gearfreak 3 · 0⤊ 0⤋
i dont think it would
2006-08-07 06:59:08 · answer #5 · answered by Anonymous · 0⤊ 0⤋