Originally Posted By: dlundblad
Originally Posted By: Cooper
Originally Posted By: ZeeOSix
Originally Posted By: Cooper
I also have myself and have observed others stating that there is increased low oil pressure at startup and cold with the Ultra.
At cold start and near idle, the oil pressure should not change at all with different oil filters if all other variables are held constant. With a positive displacement oil pump, you will not see the effects of a more restrictive filter on oil pressure until you rev the engine sky high.
I've used 4 or 5 different brand filers on my Z06, and I have not seen any difference at all throughout the whole RPM range while the oil is at the same temperature during each measurement.
If you oil is slightly colder or hotter each time you start your car, the oil pressure will be different due to the oil's viscosity which changes with temperature.
Honestly, I have no idea why I am getting increased startup noise with the Fram Ultra in place. I really like the filter and want to continue using them.
I am going to do a small test with the Ultra vs the Tough Guard. Keeping all things the same, I am going to switch the filters multiple days between each other and test start up noise to see if there is a difference.....Same oil, topped up, two different filters on morning startup at similar temps and the car has sat overnight. If there is a notable difference between the two, I will note it here...
I will use new filters for both and remove the current Fram Ultra from the equation with a new filter of each.
Very interesting you're getting an increased start up noise with the Ultra. I would think it'd be comparable to the TG with identical bypasses.
Also, startup noise shouldn't be associated with the ADBV in my application since the filter is mounted upside down with the opening facing up so oil will not drain "up" into the engine. I will be testing it more over the next week as I have listed.....