Today's oil filters

[Soundguy]

oil filter on my 5.3l gmc yukon is about the size of a v8 'snack sized' juice can. Any smaller and the one from my huskee lawnmower would be larger...

 

[JDgreen227]

Correct.. but, there are usually 3 different sizes of the same filter.. Its not as hard as ya would think.

Not trying to breathe new life into the thread, but I mentioned in the beginning that both the filters I had just replaced were the paper element type, and I don't think it is possible to obtain nor install a larger one. Duroc mentions using a toilet paper filter, and I do recall those, but no doubt the older rolls of toilet paper did a better job of filtering than would todays paper rolls which were "downsized" to cut costs.

 

[Soundguy]

with as much lint as i see coming off tp these days.. no sure i'd consider using it...

 

[3930dave]

with as much lint as i see coming off tp these days.. no sure i'd consider using it...

Careful.... we might end up having a flamewar here on tp brands !

More seriously.... anybody else seeing the paper element oil filters coming out looking somewhat collapsed ? (High mileage OCI).

Rgds, D.

 

[buickanddeere]

Once we got to MPFI, I'd say fuel control accuracy was definitely a big factor.

Some of the new DI gas motors are diluting fuel again, so I'd call those cases a 1/2 step backwards in terms of that aspect of fuel control.

I noticed that certain new push lawn mowers (Briggs for one) have spin-on oil filters now. They don't look that much smaller than what is on some cars today !

Rgds, D.

The only dilution problem with DI engines is failure of the high pressure pump seals or the injector seals. Raw fuel IS NOT getting out of the combustion chamber during compression nor during the power stroke.

 

[buickanddeere]

If you look through the catalogs to find the threads and gasket sealing diameter of the factory filter. It's a quick cross reference to find a longer and sometimes larger dis filter.
Idle and run pressure are higher on both my vehicles such updated from the muffin sized filter.

 

[DeereMann]

MHarryE, help me out here....

"Carburetors were a huge fuel waster because they had to be tuned so the leanest cylinder was rich enough so on a V-8 most of the cylinders were running super rich which resulted in poor burn and oil contamination."

MPFI engines have only a single, master mass airflow sensor in the engine air intake plenum. They are quite expensive. So how could a MPFI engine have it's A/F ratio tuned per each cylinder? Doesn't it tune the "average" A/F ratio for all cylinders via the O2 sensor in the exhaust pipe?

Curious, thanks.

 

[Midniteoyl]

MHarryE, help me out here....

"Carburetors were a huge fuel waster because they had to be tuned so the leanest cylinder was rich enough so on a V-8 most of the cylinders were running super rich which resulted in poor burn and oil contamination."

MPFI engines have only a single, master mass airflow sensor in the engine air intake plenum. They are quite expensive. So how could a MPFI engine have it's A/F ratio tuned per each cylinder? Doesn't it tune the "average" A/F ratio for all cylinders via the O2 sensor in the exhaust pipe?

Curious, thanks.

Yes.. But more accurately for changing conditions. A carb properly tuned still makes more peak HP and can get the same MPG.

 

[3930dave]

The only dilution problem with DI engines is failure of the high pressure pump seals or the injector seals. Raw fuel IS NOT getting out of the combustion chamber during compression nor during the power stroke.

I don't have a DI gas motor (yet) so I haven't looked at the specific mechanisms - just noted the dilution data for some DI motors in UOA reports on BITOG. In the diesel world, a good HDEO should be designed to tolerate something like a 4%+ dilution level, as DI has been common there much longer.

Not all DI gas motors have this problem. If I did own one, I'd be doing some research to see if there are any known dilution trends on that particular engine/year. Not an issue, for the trade-in-at-98k folks though.

One thing I haven't seen data on.... tolerance of oil filters for gasoline dilution..... more winter night reading....

I bring it up because diesel fuel in oil is one thing, gasoline is another story - even w/o considering its ever escalating ethanol contamination. If I was a bearing, while I wouldn't want to see either added, I'd taken diesel over gasoline any day.

Rgds, D.

 

[nahfwt]

The diesel in oil is coming from regens on newer diesels (2008+). During the regen cycle diesel is injected in the exhaust stroke to increase exhaust temperatures. This allows the cleaning of the diesel particulate filter by burning out collected soot. Unfortunately this also allows unburned fuel to wash down the cylinder wall. This process is specific to Diesel engines and is not caused by direct injection itself but rather by emissions controls. Also, this is the main reason you can no longer extend oil change intervals on newer diesels.