Originally Posted By: Shannow
Originally Posted By: Gary Allan
I do thank you and Shannow for your patience. I'm arguing points that are conceptual road blocks that will take a longer process to piece together and get through. No one is taking the rhetorical bait
Thinner oil/more offset/more leakage
Double volume/same offset/much mo leakage
A very intuitive concept
Seeing as I'm having the day off, I worked through the example at the end of the spreadsheet that Gary and JAG posted, of the SAE 10 and 40 weight oils in the same.
Results were (note, too many significant figures for the printed graphs)
SAE 40 had 63% increase in film thickness over SAE10
SAE 40 had 61% increase in power requirement over SAE10
SAE 40 had 5F increase in Delta T (10F in outlet temp)
SAE 40 had 7.5% lower side flow (leakage and cooling)
SAE 40 had 113% more viscosity than SAE10 at working temp.
And having used the graphs in the spreadsheet, I'm Soooo glad that I studied in S.I....no wonder things run into Mars every now and then.
Quoted to rebump the thread, as some seem to be having difficulties grasping a few concepts.
Been back and check, and the links are mostly broken.
However, this presetnation goes over the basics