Originally Posted By: daman
Originally Posted By: SuperBusa
When the ACDelco UPF series filters came out, they were advertised (by ACDelco of course) as very efficient filters that also had very good flow characteristics.
Yup i remember,suppose to flow well,i run them on my Z71 with 10w30HM all winter and no problems with ticking or anything,great filter.
That's where this famous graph came from ... ACDelco was showing how well the UPF Ultragaurd filters flowed (with cold oil in this case) compared to others.
There was a big hupla by some on the Vette boards saying the UPF didn't flow well, but I had many emails with the ACDelco Tech Dept, and they said the people doing "garage flow testing" didn't know what they were doing and that the data in the graph was accurate based on controlled lab testing.
Originally Posted By: SuperBusa
When the ACDelco UPF series filters came out, they were advertised (by ACDelco of course) as very efficient filters that also had very good flow characteristics.
Yup i remember,suppose to flow well,i run them on my Z71 with 10w30HM all winter and no problems with ticking or anything,great filter.
That's where this famous graph came from ... ACDelco was showing how well the UPF Ultragaurd filters flowed (with cold oil in this case) compared to others.
There was a big hupla by some on the Vette boards saying the UPF didn't flow well, but I had many emails with the ACDelco Tech Dept, and they said the people doing "garage flow testing" didn't know what they were doing and that the data in the graph was accurate based on controlled lab testing.