%&#*324kin' Official Hard At Work Thread%&#*%
#391
#392
#393
Registered User
Multi-weight oils (such as 10W-30) are a new invention made possible by adding polymers to oil. The polymers allow the oil to have different weights at different temperatures. The first number indicates the viscosity of the oil at a cold temperature, while the second number indicates the viscosity at operating temperature.
At cold temperatures, the polymers are coiled up and allow the oil to flow as their low numbers indicate. As the oil warms up, the polymers begin to unwind into long chains that prevent the oil from thinning as much as it normally would. The result is that at 100 degrees C, the oil has thinned only as much as the higher viscosity number indicates. Another way of looking at multi-vis oils is to think of a 20W-50 as a 20 weight oil that will not thin more than a 50 weight would when hot.
The difference in viscosity is for providing adequate lubrication during cold starts and until the oil is brought to operating temperature. At least this is how I understood it...
#394
Community Organizer
#395
Community Organizer
#396
Community Organizer
#397
Community Organizer
#398
Community Organizer
#399
Community Organizer
Originally Posted by 3AFL S2K' timestamp='1301451931' post='20409936
If you get an invitation to a wedding and it doesn't say guest, can I bring a lady to screw?
#400
Community Organizer
That's all I got. I'm going back to bed now.