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Old 03-07-2001, 02:04 AM
Jason M.
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Anyone know the number of a larger than specified oil filter for a 300E? I use Mobil One Filters when I can get my hands on them and Purolater otherwise, I just think that the prescribed filter is alittle small for 7.5 quarts....

Jason M.
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Old 03-07-2001, 07:36 AM
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I never thought of this before. In the late sixties, GM started using a short little filter on some of their cars. There was a longer one that would screw right in place. It probably cost the same amount.

I have not worried about this on my 103 motor because I change the oil and filter very frequently. But for those who wish to extend their oil change intervals, if there is a longer filter available, this would be a great thing to find.

Have a great day,
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Old 03-07-2001, 08:34 AM
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My Dad had a oil filter that was a cannister with toilet
paper for the filter, in his old Ford Truck. It was an
accessory filter and the oil looked very clean between
changes. Ah, The days of non-detergent oil. I believe
it was called the Franz Oil Filter.

Some info on the link above. Should be more on the
internet. I believe Hengst has an accessory filter too.

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Old 03-07-2001, 09:54 AM
Jason M.
Posts: n/a
GM Late 60's


You're thinking of the (ACDELCO) PF25(short) PF35(Long) and PF1218( same as PF35 but with an internal check valve) for Chevy Small and Big block V8's

Its on the right track,and those oversize filters are listed in the Purolator and AC Delco books, but they have kinda over looked Mercedes.

I use mobil one and change between 1.5k and 3k miles (still clear amber color) but I can't ever leave well enough alone

Anyone else have any ideas?

Jason M.
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Old 03-07-2001, 09:54 AM
Join Date: Jan 2001
Location: Send me back to Atlanta
Posts: 876
Amsoil sells a double filter setup. You should be able to find one though a heavy duty truck repair center.
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2006 Mazda Tribute
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Old 03-07-2001, 07:13 PM
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Join Date: Jan 2001
Location: Santa Clara, CA
Posts: 437
Actually, you are probably better off leaving the filter in place for a longer period of time as it is a depth filter. Depth filters get more efficient with use as the particles start to pile up on the filter media and therefore reduce the porosity of the filter to filter finer and finer particles. Obviously, there is a point in time where the flow, pressure, etc. dictate change, but without a pressure gauge on each side of the filter to give you pressure drop, or a flow meter, you just have to go by instinct. Anybody ever actually instumentate or otherwise run tests on this?
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Old 03-08-2001, 02:00 PM
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If I may ask, why are you interested in increasing the size and/or capacity of your oil filter? I've never heard of any MB engine that had a problem attributable to inadequate oil filtration with the stock oil filters. That includes diesels. If your oil is coming out of the drain plug "still clear amber color" as you say after changing at 1.5 - 3 k mile intervals, exactly what is your objective?

This sounds almost as much overkill as the fellow I read about yesterday who replaced his brake rotors every time he replaced his pads, "just because it felt like a good thing to do". Its a free country and to each their own, but it sounds like your car is suffering from OOCD (Owner's Obsessive Compulsive Disorder).

As an alternative to replacing with a different assembly design, and since filtration performance is a function of time in service, why don't you unscrew the old filter and replace it with a brand new clean one every 500 miles?
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