Finer filter

Brian i have a 92 4.2 diesel patrol non turbo i was lacking badly in power so fitted extractors bigger pipes, snorkel, which helped then i fitted finer filters and noticed a big improvement in power and fuel economy. Like any thing u have to do regular serviceing. In the long run i have found these filters cheaper to run than the originals, my opinion i swear by them. Col

I have been using Unifilters (similar to finer filters) in my GQ Patrol 4.2 Diesel (no turbo) for some time now - about 150,000 km. Previously used on a 2.5 Turbo Pajero. Noticed slight improvement in both power and fuel economy compared to standard paper element filters. The BIG difference was in dust retention particularly noticeable in the Patrol pre-cleaner. Nothing or only very fine dust gets through to the main filter. It is also a lot cheaper if you are prepared to do the servicing In dusty conditions I also run a Doaldson pre-cleaner on top of the snorkel and finds this reduces the clogging. At low speeds this doesn't affect performance.
Regular servicing using the proper oil is a must.
Use the wrong oil (eg.engine oil) and you will have economy problems. I carry a couple of spare foam bands. This is convenient as far as space is concerned compared to carrying spare paper elements.

Tell me, do you guys who use the foam also oil the inner foam filter, if so how do you wring it out, being in a metal receptacle, or does the oiling of the outer band disipate to the inner from the air velocity?

Bob you may think i am dreaming, but unlike yourself i have tried both paper and oil filled filters and if you understood how a foam filter works you may then make a sensible comment. If you look into the dirt bike scene you will find these machines have been useing foam oil filters for many years, as they improve performance and are far superior in filtering out the dust. When a paper filter starts to get dust on the surface it restricts flow slowly getting worse till the filter is changed, oil filters improve flow as dust sticks to the outside and draws the oil out and this is where servicing comes in when u start seeing dry spots on the foam it is time to clean and re oil. These are scientific facts proven many times over. If you read 4wd monthly they did an article on finer filters, march 2001. Colin

Brian, I took my Finer Filter off my 4.2 turbo Nissan GU after having had a stage 2 power upgrade done. It was blowing black smoke so I changed to a K&N filter. They are a bit dearer but tests seem to indicate that they actually work and I no longer lay a trail of soot. The K&N seems to have a larger surface area than the Finer and I guess this is the secret. Keeping a filter too clean is also a problem. Oiled filters work better with some dust on them.