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Posted

I believe the decal shown here is the correct one for my oil filter canister (49 Special Deluxe):

http://catalog.osborn-reproduction.com/index.php?productID=75787

The only thing that makes me wonder is it says "sealed system" on it, which mine is not. Does anyone know? Also, has anyone ordered from these guys before? Seems like there's no way to actually place an order (or I'm missing something obvious).

Posted
I would guess that "sealed system" refers to the throw away canister not the replaceable filter type.

It does. The part number on it and the "MPR 1/2" on it are the indications that it is the throwaway canister.

Posted

The page says, "This Decal Went of the lid of the oil filter housing in front of the wingnut". These people probably do know the difference in the oil filters housings. The website is under contruction, so one can not order anything at the present time. WWW.jorepro.com, maybe to order.

Posted

It’s closer than the “Full Flow” decals everyone uses. Here are some NOS filters I saw on eBay a while back, they have the paper filter you change, and shows that type of decal on the lid. Lee

post-309-13585353265053_thumb.jpg

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Posted

I find the wording on the decal very odd. When these type of filters were being used we did not have synthtic oils. Everyone was told to change the oil every 3k miles. Now the original decals told you that you could go 8K miles using the older straight oil back inthe 50's

Now we are being told that with a synthetic blended oil we can go upto 5k on our cars and with full synthtic 7-10k miles.

When we used the old style oils according to the Mopar engineers we could go longer on the regular oils then we can with the newer oils. An to make matters even more questionable is that the roads back in those days still had a lot of dirt roads, thus this is why they used the old style oil bath air filters to help capture the dust from getting into the carb and internal of the engine.

This is open for points of discussion from the group.

Rich HArtung

Desoto1939@aol.com

Posted (edited)
take note of changing oil every 8 k miles]

Could the difference be by-pass as opposed to full flow filters?

Bingo!

If a bypass filter clogs up it simply stops bypassing and your engine still gets oil.

If a full flow filter clogs up it opens a cheaply made internal bypass valve and dumps all of its accumulated crud into the engine. You really don't want that to happen. And you have no way to know how full the filter is. So you should replace the filter at every oil change.

Update: Full flow filters vary widely on the quality and in particular in the quality of the safety/bypass valve. Look around the web for articles where people have cut these things open. It could be that a low end filter had a leaky valve and wasn't filtering at all. All in all, the bypass filter does have some advantages and I wonder why people are so keen on replacing them with a full full filter.

Edited by TodFitch
Posted

What I am questioning is that the older orginal sticker told the user that they could get 8 thousand miles on a filter and oil change. But we were told to chnage the oil every 3 thousand mile with conventional oil.

Now we have syn blended oils and better filters and now we are told to change at 5k which is less than 8 k and we now have better filters and and also better oils.

I do not understand. So who is correct or are we being sold a bill of BS by the oil and filter companies.

Mobil 1 now has an oil that will go 15k before an oil change but you should chnage the filter at 7.5k. The have a stipulation that if the car is stillunder warranty that you should stick with the manufactures suggested plan and then when out of warranty you can go with their plan.

Who is plulling our proverbial chain!!!!!

Rich Hartung

desoto1939@aol.com

Posted

It doesnt say to change the oil and filter every 8k. Just the filter. As Tod mentioned with the bypass you can let the filter go longer without as much risk. I still change mine every 2K miles or once a year.

Posted
What I am questioning is that the older orginal sticker told the user that they could get 8 thousand miles on a filter and oil change. But we were told to chnage the oil every 3 thousand mile with conventional oil....snip...

The "change the filter when you change the oil" came in with full flow filters for the reason I mentioned in an earlier post.

I don't have the owner's manual in front of me but if I recall correctly, the oil change interval on my 1933 is 2,000 miles while the filter change is 10,000 miles.

Actually, there is a paragraph in there about opening a drain plug on the bottom of the canister while the engine is running at hot idle (10 PSI on the gauge) and verify if a stream of clean oil comes out. As long as that is true the filter is still good. I did once have an old canister filter with that extra drain plug but none that I've seen in the last 25 years have had it.

In my more cynical moments I wonder if they went to full flow filters to make more money on the consumables used in maintenance.

Posted

Todd is correct. My '35 manual says to run 30 or 40 wt. in the summer and change oil evry 1500 miles. In the winter, run 10 or 20 wt. and change oil every 100 miles.

The filter change is every 10,000 miles.

Some of the decals say X,000 miles OR once a year.

Posted

Lots of stuff to consider here, but when I was working for the dodge dealership in the mid 60's doing tuneups and oil changes and grease jobs, The standard operating procedure was to change the filter at every other oil change. The recommended change interval was 3000 miles.

I do recall that some owners asked for the filter to be changed everytime and a less that 2 bucks it was probably cheap insurance. I believe oil was 75 cents a quart.

When the 3000 mile recomendation was developed a lot of oils were parafin based, non detergent, single viscosity, oils, and a lot of roads were gravel outside of towns and cities. I believe if you look at modern owners manuals, most recommend 5 to 7k miles for normal operating conditions. However service places cling to the 3000 mile recommendation for obvious reasons, more sales more profits. Supporting as Jim's consumables point.

I see some articles that the common change interval in Europe is annually or 10K miles with synthetics. Paves roads, better filtration and detergents would seem to bear this out as the lubricating properties of oil do not actually deminish, the impurities it carries are more the concern.

Personally I run my drivers to 5 to 7k and the one my daughter still drives with 170k on it is just starting to need a quart of oil every month or so.

With my Plymouth it gets an oil change each spring. Filter included. which works out to about every 3000 miles.

I think the bypass filter since it was filtering 30% of the oil its life was considered longer then the oil if served.

Posted
It’s closer than the “Full Flow” decals everyone uses. Here are some NOS filters I saw on eBay a while back, they have the paper filter you change, and shows that type of decal on the lid. Lee

I cringe when I see a full flow decal on a by-pass filter assembly!

If a full flow filter clogs up it opens a cheaply made internal bypass valve and dumps all of its accumulated crud into the engine. .

Tod;

You are correct! The internal by-pass is cheaply made. But I feel that full flow filtration is better than by-pass. Combining the two is the best of both worlds.

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