Oil Filter Life - The Ford Focus Forum

**Take_That_Subspace!** · 06-28-2009, 04:51 PM

With synthetic oil the change interval is longer than with standard oil. But, will most oil filters still function as they should when their mileage greatly exceeds 3,000? One of the reasons I ask is that I have seen one filter that has it's replacement interval printed on the filter, but that is the only filter I have seen it.

**getn2focus** · 06-28-2009, 11:35 PM

I use a Castrol Full Synthetic. I can run about 5,000-5,500 miles for my oil change intervals. The Motorcraft oil filter holds up fine for that amount. I auto-x the car every month when I have the chance. I personally wouldn't let any filter go much longer then that.

**Jibberish18** · 06-29-2009, 03:20 AM

Depends on the design of the filter. I don't know what most filters SHOULD go to but some filters are designed specifically to hold more crud but those same filters don't filter as well as other filters that are designed to catch particles of a smaller size. Then again the filters that are suppose to filter better also don't flow as well. It's all a cycle.

**TXFO** · 06-30-2009, 07:49 PM

this is a tough subject because there is alot of disagreement.

Porsche recomends 30k miles between oil changes and filter changes every 15k. (Porsches use 10 to 13 quarts of oil)

Mercedes was 15K on oil and filters every 5k.

Honda is 15 and 5

BMW was 10 and 5.

MB and BMW are now using FSS that moniters run time, mileage, and temperature to recomend when oil changes are due.

The thing to remember is the manufacturers want to push oil changes back because it lowers the yearly cost of ownership. This number has become more and more important as a selling point so anything they can do to lower this number, they will. Oil changes dont bother them because descent oil is going to do ok and by the time there is a problem, you are out of warrenty.

In my car, I run mobil 1 synthetic for 10k miles with no filter change in between. My engine has 170k miles on it and I have no sludge or problems so far.

**Take_That_Subspace!** · 07-01-2009, 08:46 PM

TXFO: What filter are you using?

**TXFO** · 07-02-2009, 07:06 PM

motorcraft.

**sportscarfan1989** · 07-02-2009, 10:38 PM

I dont care what oil you use every oil change new filter. ITS YOUR ENGINE! not something that i would toy with. I personally like the napa gold filters

**TXFO** · 07-03-2009, 06:48 PM

No body here said dont change the filter at every oil change.

What I said was that some manufacturers recomend extended oil intervals with filter changes in between.

06-28-2009, 04:51 PM	#1 (permalink)
Take_That_Subspace! TEAM Member Join Date: Mar 2009 Posts: 106	Oil Filter Life With synthetic oil the change interval is longer than with standard oil. But, will most oil filters still function as they should when their mileage greatly exceeds 3,000? One of the reasons I ask is that I have seen one filter that has it's replacement interval printed on the filter, but that is the only filter I have seen it. __________________ TBP

06-28-2009, 11:35 PM	#2 (permalink)
getn2focus TEAM Member Join Date: Feb 2008 Location: Mid TN Posts: 561	Re: Oil Filter Life I use a Castrol Full Synthetic. I can run about 5,000-5,500 miles for my oil change intervals. The Motorcraft oil filter holds up fine for that amount. I auto-x the car every month when I have the chance. I personally wouldn't let any filter go much longer then that. __________________ *Black 2003 SVTF* >>> E Prep Auto-X monster** What to do when you roll a rental car in an auto-x? "You quickly roll/tow/carry it onto a public road and THEN call the rental agency." -- GtnMaZumOn

06-29-2009, 03:20 AM	#3 (permalink)
Jibberish18 I Now Post Stupid **** Join Date: Apr 2003 Location: Chicago Posts: 4,620	Re: Oil Filter Life Depends on the design of the filter. I don't know what most filters SHOULD go to but some filters are designed specifically to hold more crud but those same filters don't filter as well as other filters that are designed to catch particles of a smaller size. Then again the filters that are suppose to filter better also don't flow as well. It's all a cycle. __________________ "If You Never Had The Bad Times, How Would You Know You Had The Good Times?" -DEATH

06-30-2009, 07:49 PM	#4 (permalink)
TXFO Not Special Enough Join Date: Jul 2002 Location: back in Jane's diary Posts: 13,862	Re: Oil Filter Life this is a tough subject because there is alot of disagreement. Porsche recomends 30k miles between oil changes and filter changes every 15k. (Porsches use 10 to 13 quarts of oil) Mercedes was 15K on oil and filters every 5k. Honda is 15 and 5 BMW was 10 and 5. MB and BMW are now using FSS that moniters run time, mileage, and temperature to recomend when oil changes are due. The thing to remember is the manufacturers want to push oil changes back because it lowers the yearly cost of ownership. This number has become more and more important as a selling point so anything they can do to lower this number, they will. Oil changes dont bother them because descent oil is going to do ok and by the time there is a problem, you are out of warrenty. In my car, I run mobil 1 synthetic for 10k miles with no filter change in between. My engine has 170k miles on it and I have no sludge or problems so far. __________________ German and Italian car tech. Fixin to adjust the knob to HIGH POWERED. black belt at the drunk as balls dojo. Bloodshot eyes, metal skin, serpent's tongue, dagger claws, dragon wings, crooked horns. KING!

07-01-2009, 08:46 PM	#5 (permalink)
Take_That_Subspace! TEAM Member Join Date: Mar 2009 Posts: 106	Re: Oil Filter Life TXFO: What filter are you using? __________________ TBP

07-02-2009, 07:06 PM	#6 (permalink)
TXFO Not Special Enough Join Date: Jul 2002 Location: back in Jane's diary Posts: 13,862	Re: Oil Filter Life motorcraft. __________________ German and Italian car tech. Fixin to adjust the knob to HIGH POWERED. black belt at the drunk as balls dojo. Bloodshot eyes, metal skin, serpent's tongue, dagger claws, dragon wings, crooked horns. KING!

07-02-2009, 10:38 PM	#7 (permalink)
sportscarfan1989 TEAM Member Join Date: Sep 2008 Posts: 278	Re: Oil Filter Life I dont care what oil you use every oil change new filter. ITS YOUR ENGINE! not something that i would toy with. I personally like the napa gold filters

07-03-2009, 06:48 PM	#8 (permalink)
TXFO Not Special Enough Join Date: Jul 2002 Location: back in Jane's diary Posts: 13,862	Re: Oil Filter Life No body here said dont change the filter at every oil change. What I said was that some manufacturers recomend extended oil intervals with filter changes in between. __________________ German and Italian car tech. Fixin to adjust the knob to HIGH POWERED. black belt at the drunk as balls dojo. Bloodshot eyes, metal skin, serpent's tongue, dagger claws, dragon wings, crooked horns. KING!

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