valley
Platinum Member
Greetings, Has anyone added a bypass filter to their car or tractor? What kind? What results? Thanks Richard
Bypass oil filter on car or tractor
- Thread starter valley
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GreenLawnFarm
Bronze Member
those filters can be expensive, but so is destroying the engine. i wouldn't do it.
tommu56
Elite Member
some of the old (40's 50's) Mack fire trucks I worked on had them they used the oil pump to supply pressure to engine and some went to filter and drined back in to crank case.
I would thing you would need a large volume pump or separate pump to do it today.
I guess they thought dirty oil is better than no oil if filter got plugged.
tom
I would thing you would need a large volume pump or separate pump to do it today.
I guess they thought dirty oil is better than no oil if filter got plugged.
tom
thatguy
Elite Member
I know that Amsoil sells bypass kits for some vehicles (I think BIG trucks and most diesel pickups).. You could check out their website for information.
A lot of ppl that run synthetic oil and extended oil changes swear by the kits..
brian
A lot of ppl that run synthetic oil and extended oil changes swear by the kits..
brian
WH401
Platinum Member
Amsoil sells bypass filter systems and there pretty popular among the diesel truck crowd. Go to any Ford, Chevy, or Dodge diesel forum and you'll found numerous amounts of people that run them. I plan to put one on my 06 Dodge when I get around to it because the bypass filters so much better than just a full flow alone.
WH401
Platinum Member
Exactly, that's the only way to do it IMO. Amsoil offers kits that mount directly to the OEM filter housing and then relocate the full flow to a separate mount that includes the bypass filter too. If you run a setup like that than you risk running into the engine being starved for oil because of the excess length, or inability, to build oil pressure. Running 1 bypass filter inline with the already existing OEM full flow is the only safe way to go.
In 1972 I installed a Frantz oil filter on my Ford Maverick. The unit teed into the oil pressure sending unit and returned oil through a fitting in the oil pan.
I drove the car 7 years, put a new roll of toilet paper in the car every 1500-2000 miles, topped off the oil, changed the regular filter every year, topped off the oil and the oil looked like new when I traded the car in.
The oil drain plug on the car had never been loosened.
Unfortunately I did not remove the unit prior to trade in.
I have no reservations about recommending the Frantz filter.
Their web site offers complete info on the unit.
Frantz Filters Manufactured by We Filter It! Inc - Oil, Diesel and Gas Filters
I drove the car 7 years, put a new roll of toilet paper in the car every 1500-2000 miles, topped off the oil, changed the regular filter every year, topped off the oil and the oil looked like new when I traded the car in.
The oil drain plug on the car had never been loosened.
Unfortunately I did not remove the unit prior to trade in.
I have no reservations about recommending the Frantz filter.
Their web site offers complete info on the unit.
Frantz Filters Manufactured by We Filter It! Inc - Oil, Diesel and Gas Filters
Volfandt
Veteran Member
Back in 73/74, during Uncle Sam's NAVAir/USMC internal combustion engine maintenance training, one of my Navy instructors "swore" that running an aux filter that used a toilet paper roll as the filter medium would do away with oil changes. Said that all his vehicles had them and all he did was change the toilet paper roll regularly, the regular filter yearly and only top off the oil when needed.
I never did try it but it's lingered in my brain housing group since.
You wouldn't have ever been stationed at NAS Memphis now would ya
fieldserviceengineer
Bronze Member
For those who may not know, a bypass filter is one that is supplied with a small volume of oil processed through the filter media and returned back to the crankcase at zero pressure. It is never part of the pressurized lubrication system. Bypass filtration bypasses the high volume full flow oil circuit. Someone stated that they would install the bypass in line with the full flow filter. Doing that would not work as the bypass filter head has a very small orifice to reduce the flow through the bypass filter. Thus, it would starve the main oil rifle passage (oil gallery) and destroy the engine. It is correct that this type of filter system needs sufficient oil pump volume to be able to spare a small volume of the oil to be diverted away from main engine lubrication. Some diesel truck engines (18 wheel) have bypass systems that operate on 2 GPM maximum flow. Engines of that size can spare that volume without jeopardizing the lubrication requirements of the engine. To install such a system on a small diesel or gasoline engine would require a much smaller control orifice to prevent oil starvation of the main full flow filter.
