antique car oil bypass filter systems

Joined
Sep 16, 2020
Messages
2
Several car manufactures such as Studebaker, installed bypass filters on their motors until 1962, when they went to
full flow filters.
I've read thru a lot of posts on here concerning bypass filters but these are all add on systems that I can see.
What is your opinion or expertise concerning the original factory installations?
 
Joined
Jul 12, 2012
Messages
3,862
Location
Caldwell Idaho
They were much better than no filter at all. I worked on forklifts and the older industrial engines with only bypass filters had about half the life of the same engines when equipped with full flow filters. The bypass only filters didn't provide "filtered" oil to the bearings camshaft etc.
 

studegator

Thread starter
Joined
Sep 16, 2020
Messages
2
It is strange to me as I've owned and driven both models of Studebaker, pre 62 and post 62, and as far as wear goes
I could not tell a difference in the bearing area wear.
 
Joined
Jul 12, 2012
Messages
3,862
Location
Caldwell Idaho
Working on the engines as mentioned i have seen the differences in them life of the engines. Bypass filter much better that no filter and full flow filter much better than the bypass filter.
 
Joined
Jan 22, 2011
Messages
6,029
Location
Ohio
Working on the engines as mentioned i have seen the differences in them life of the engines. Bypass filter much better that no filter and full flow filter much better than the bypass filter.
That's common sense.
 
Joined
Dec 4, 2018
Messages
2,548
Location
USA
In 1942 Fram offered a depth type high efficiency bypass filter. It’s in their history on their website. Modern bypass filters like Frantz keep oil analytically clean. So the bypass system is good. I don’t know what the circumstances in days of yore made it seem otherwise, but if the element and system is good, the filtering is good. Here is the proof. One thing is an old bypass pipe or element can be plugged up from lack of maintenance and the engine doesn’t run any different but is not getting filtered oil.
I post this link a lot. The bypass cleans up what the full flow didn’t, in only 200 miles.
 
Joined
Oct 9, 2004
Messages
11,550
Location
Cincinnati, OH, USA
In 1942 Fram offered a depth type high efficiency bypass filter. It’s in their history on their website. Modern bypass filters like Frantz keep oil analytically clean. So the bypass system is good. I don’t know what the circumstances in days of yore made it seem otherwise, but if the element and system is good, the filtering is good. Here is the proof. One thing is an old bypass pipe or element can be plugged up from lack of maintenance and the engine doesn’t run any different but is not getting filtered oil.
I post this link a lot. The bypass cleans up what the full flow didn’t, in only 200 miles.
One thing to remember is-there isn’t much comparable between an old, carbureted, conventional oil using, likely oil bath air cleaner & road draft tube equipped engine of old and a modern, EFI, synthetic or blend using engine of today. I bet an old school bypass would keep a little 4 cylinder EFI engine as clean or cleaner, likely for longer, than a teacup sized jobber full flow filter.
 
Joined
Jul 12, 2012
Messages
3,862
Location
Caldwell Idaho
One thing to remember is-there isn’t much comparable between an old, carbureted, conventional oil using, likely oil bath air cleaner & road draft tube equipped engine of old and a modern, EFI, synthetic or blend using engine of today. I bet an old school bypass would keep a little 4 cylinder EFI engine as clean or cleaner, likely for longer, than a teacup sized jobber full flow filter.
It doesn't filter the oil to the bearings etc.
 
Top