I'm not sure about the quality of Fram air filters, but their oil
filters are junk and can cause problems with Hyundai engines (there's a
TSB about this for the Elantra). The only Fram product that I use on my
car is their oil drain valve.
What do you mean by junk? The filtering ability is "not good" or do
they have mechanical problems like internal media clogging, leaking etc..
I've been using various oil filters for years and I have not noticed a
difference in any brand over another and have not noticed any filtering
problems, maybe I would not not notice them? Only two of my cars
actually have an oil pressure gauge though.
Almost all filters I've used look indentical in construction including
various lettered codes stamped on them. I've noticed some of them have
metal shaving around the threads left over from a poor tap job but even
that was not limited to a specific brand. If I see that on one, I put
it down and grab a different one.
In my Elantra for oil filters, I've either used the SuperTech from
WalMart or a Purolator from various parts stores. I do not use the book
suggested SuperTech though, there is a model that is slightly larger and
about the physical size of the suggested Purolator model. I do not have
the part number handy. Depending on where I am when I decide to by a
filters and is the type I buy. All of my cars (5 of them) can take
10w-30 so I always have a quite a few of the 5 quart containers of that
To stay on topic with the thread, you can get a K&N air filter for your
Elantra if you feel comfortable with their dirt blocking ability, you
won't see any performance increase like some people like to claim on an
Elantra but it will save you on buying more filters if you do not mind
cleaning and oiling them as required.
They have less media, which reduces their life. They're poorly
constructed, leading to failures of the valves and other components.
They bypass valve opens way below Hyundai's specifications. As I said,
Go to bobistheoilguy.com and read the tests of filters. There is a much
wider variation in construction and filter media than you might think.
Purolator filters are fine, but I'm not sure who's making Supertech
filters, so I don't use them (I do use Supertech synthetic oil). Pep
Boys house-brand filters are made by Purolator. Regarding filter size,
Purolator's #14459 is the stock size. They used to make the #24458 that
was ~40% longer, but they discontinued it.
Unless you live in a hot area, you're probably better off with 5W-30.
I wouldn't put one in my car if they gave it to me.
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