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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / February 2007oil filters, using another of identical size
how important is it to use only the reference list (ie. Advanced Auto Parts, Napa, all have a filter/vehicle match chart) oil filter vs. any similarly sized oil filter especially if the sizes are identical and the seals match the oil filter mount on the block? what's is different inside the same sized filters? > how important is it to use only the reference list (ie. Advanced Auto > Parts, Napa, all have a filter/vehicle match chart) oil filter vs. any > similarly sized oil filter especially if the sizes are identical and the > seals match the oil filter mount on the block? > > what's is different inside the same sized filters? Anti-drainback valve, for just one example. In an application where the filter is vertically mounted with the base pointing up, such as my Audi or Subaru, there is no need for an anti-drainback valve. Using such a filter on an engine where the filter is mounted sideways or base down could result in zero oil pressure every time the engine is started. It won't ruin the engine right away, but over time the extra wear adds up. There are other characteristics that can differ too, such as the internal pressure relief valve, and the overall pressure rating of the can. >> how important is it to use only the reference list (ie. Advanced >> Auto Parts, Napa, all have a filter/vehicle match chart) oil filter [quoted text clipped - 14 lines] > right away, > but over time the extra wear adds up. Not true. If you have a vehicle where oil pressure is used to operate an OHC chain tensioner and/or overhead lash adjuster an ADBV (anti-drain back valve) is needed to prevent oil from leaking back through the filter. Subaru spin-on filters do include an ADBV. Recent Audis use cartridge type filters, so the ADBV is incorporated into the oil system, not the filter. Older Audis that used spin-on filters, did incorporate an ADBV, > There are other characteristics that can differ too, such as the > internal > pressure relief valve, and the overall pressure rating of the can. harris <harr@is.is> wrote in article <52u5tmF1pji5tU1@mid.individual.net>... > how important is it to use only the reference list (ie. Advanced Auto Parts, Napa, all > have a filter/vehicle match chart) oil filter vs. any similarly sized oil filter > especially if the sizes are identical and the seals match the oil filter mount on the > block? > > what's is different inside the same sized filters? Anti-drainback valves..... Oil pressure relief valves..... Bypass valve pressures..... etc. They don't make such a wide variety just to keep their production machinery busy......... I ran into one guy who actually listened to the Junior High School, "Assistant Manager" at the local retail auto parts place and was running a larger capacity filter on his Buick 455. Problem was that only two filters screwed onto the horizontal mount - the correct one with the anti-drainback valve and the one he had on there *without* the anti-drainback valve. Where he believed he was increasing his filtering capacity, he was actually subjecting his engine to dry starts - every, single time - as the filter would drain out whenever the engine was shut off. Always - ALWAYS - use the catalog-recommended filter for your application. > Where he believed he was increasing his filtering capacity, he was actually > subjecting his engine to dry starts - every, single time - as the filter > would drain out whenever the engine was shut off. > > Always - ALWAYS - use the catalog-recommended filter for your application. That isn't exactly true. You can use a bigger filter if you know what your doing. For example, GM specs 2 different filters for their V6 2.8L engine. One is a long one and one is a short one. If you look through the oil filter catalog for different vehicles that use the same 2.8L engine you will see some vehicles with the long filter and some with the short. The difference is that the vehicles with the short filter are speced for the short filter because their engine compartments supposedly have less clearance for the long filter. In reality, some don't have the clearance and some do, but GM and the filter references will always spec the short filter if the guy writing the reference hadn't bothered to check to see if the long filter would have fit that particular year and model. Ted Ted Mittelstaedt <tedm@toybox.placo.com> wrote in article <newscache$d9v6dj$djv$1@news.ipinc.net>... > That isn't exactly true. You can use a bigger filter if you know what your > doing. [quoted text clipped - 16 lines] > would have > fit that particular year and model. When I ran a NAPA store, I did exactly that on several occasions - using the specs at the back of the (paper) filter catalog. But, the OP appears to be somewhat less knowledgeable of what constitutes filter specifications, and is likely the type of person for whom a simple "Don't Do It!" is the most logical answer. Some people would take your advice above to mean...."If it fits, it's okay. The guy on the Internet said so." > > Where he believed he was increasing his filtering capacity, he was > actually [quoted text clipped - 25 lines] > > Ted No kidding; the number of filters for the universal chevy v8, just the ones available from GM.... big filters, small filters, truck filters, racing filters, Sheesh. > how important is it to use only the reference list (ie. Advanced Auto > Parts, Napa, all have a filter/vehicle match chart) oil filter vs. any > similarly sized oil filter especially if the sizes are identical and the > seals match the oil filter mount on the block? > > what's is different inside the same sized filters? Maybe nothing, but many things are POSSIBLY different: Presence or absence of a bypass valve, pressure setting of the bypass valve, presence or absence of an anti-drainback valve. I have heard of people using different filters if they were larger, but never a different one if it's the same size. Can you explain why you want to do this? |
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