An interesting tidbit in this article I found:
http://www.busride.com/Page.cfm/PageID/8607
"Since the crank journal is constantly under load as compared to the 4-stroke engines, the 2-stroke engines require a single-grade oil with a higher viscosity. The boundary lubrication never has a chance to recover for 2-stroke engines.
In 4-stroke engines, the boundary lubrication does have a chance to recover during the non-loading turn of the crankshaft, which allows the use of multi-viscosity oils.
The use of single viscosity oil in 4- stroke engines can actually extend the life cycle with really no downside."
comments?
Now the article mainly is discussing larger engines for bus and motorcoach, but in the 80's this was how I operated a 350 cu Pontiac solely on a diet of straight 30 weight for many trouble free miles.
I know, oils have progressed so much since then and bla-bla-bla most will say, just thought some of you might find this interesting or might like to comment on the 'recovery time' as mentioned in the article with respect to boundary lubrication.
http://www.busride.com/Page.cfm/PageID/8607
"Since the crank journal is constantly under load as compared to the 4-stroke engines, the 2-stroke engines require a single-grade oil with a higher viscosity. The boundary lubrication never has a chance to recover for 2-stroke engines.
In 4-stroke engines, the boundary lubrication does have a chance to recover during the non-loading turn of the crankshaft, which allows the use of multi-viscosity oils.
The use of single viscosity oil in 4- stroke engines can actually extend the life cycle with really no downside."
comments?
Now the article mainly is discussing larger engines for bus and motorcoach, but in the 80's this was how I operated a 350 cu Pontiac solely on a diet of straight 30 weight for many trouble free miles.
I know, oils have progressed so much since then and bla-bla-bla most will say, just thought some of you might find this interesting or might like to comment on the 'recovery time' as mentioned in the article with respect to boundary lubrication.