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9000k service intervals. Should I change filter have way thru? #5457851 06/19/20 04:22 PM
Joined: Nov 2010
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wantboost Offline OP
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Joined: Nov 2010
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2015 s5 . Direct injection . Factory calls for 9000miles /15000km oil changes. Ive been changing half way thru to help with carbon build up as it Direct injection.
2015 audi s5.

My question is do I really need to change the filter also?

Re: 9000k service intervals. Should I change filter have way thru? [Re: wantboost] #5457858 06/19/20 04:31 PM
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NO2 Offline
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Just stick with the factory interval unless you do severe service driving. 9000mi is no big deal for any synthetic. The only reason to change the oil at 4500 is if you have fuel dilution.

Last edited by NO2; 06/19/20 04:32 PM.
Re: 9000k service intervals. Should I change filter have way thru? [Re: wantboost] #5457860 06/19/20 04:32 PM
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Old Mustang Guy Offline
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I would leave the filter but change the oil half way through. That’s what I do on my Avalon. 10k changes are fee at dealer but I drain oil only at 5k.

Re: 9000k service intervals. Should I change filter have way thru? [Re: wantboost] #5457863 06/19/20 04:34 PM
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Gebo Offline
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I'd change them both at 5K. My OEM filter is under $5 with a washer. Too inexpensive not to...


'98 LEX LS400 310K
'02 4Runner 250K
'05 Lex LS430 90K
'07 Lex GX470 75K

Shell Gas and Truck 5w-30
Amsoil OE 10w-30
Toyota ATF's and Coolant
Amsoil Gear Oil and Grease
Re: 9000k service intervals. Should I change filter have way thru? [Re: wantboost] #5457876 06/19/20 04:43 PM
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Ihatetochangeoil Offline
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Nothing that anyone says matters until you have UOA. You may find more info here: https://www.audiworld.com/forums/

There are many filters on the market that are rated far beyond 9K miles. FWIW, I've had enough UOA done that I've called Horizon testing and spoke to their lab director regarding "top up oil." He told me that when the TBN gets too low they just recommend a filter change. He said it's not really that the filter needs changing, the engine really just needs some top up oil. Hmmm. Why don't they just say so? If you're doing 4500 mile oil changes, you're throwing away perfectly good oil. (My two cents). I'll repeat: Nothing anyone says matters until you have UOA. Just do whatever lets you sleep at night.

Re: 9000k service intervals. Should I change filter have way thru? [Re: wantboost] #5457879 06/19/20 04:50 PM
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Old Mustang Guy Offline
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With d.i. I think you will absolutely have fuel dilution at 5k. My 19 Avalon has a hybrid system that has port and d.i.

Re: 9000k service intervals. Should I change filter have way thru? [Re: Old Mustang Guy] #5457888 06/19/20 05:00 PM
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Ihatetochangeoil Offline
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Originally Posted by Old Mustang Guy
With d.i. I think you will absolutely have fuel dilution at 5k. My 19 Avalon has a hybrid system that has port and d.i.


I'm not questioning your credibility, I'm questioning your opinion. Have you had UOA? If not, your opinion is just your opinion...Oh, I see. It starts with "I think..."

Re: 9000k service intervals. Should I change filter have way thru? [Re: wantboost] #5457902 06/19/20 05:23 PM
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Old Mustang Guy Offline
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Absolutely opinion. But I did stay at holiday inn express.

Re: 9000k service intervals. Should I change filter have way thru? [Re: Old Mustang Guy] #5458660 06/20/20 04:58 PM
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Ihatetochangeoil Offline
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Originally Posted by Old Mustang Guy
Absolutely opinion. But I did stay at holiday inn express.


Absolutely yes. I'm a Platinum member. Everything is better at holiday inn. Especially Love the cinnamon rolls.

Re: 9000k service intervals. Should I change filter have way thru? [Re: Old Mustang Guy] #5458888 06/21/20 01:44 AM
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edyvw Offline
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Originally Posted by Old Mustang Guy
With d.i. I think you will absolutely have fuel dilution at 5k. My 19 Avalon has a hybrid system that has port and d.i.

No he won't in that engine. This is not Honda.


11' BMW 328i xDrive 6MT (Pennzoil Platinum Euro 5W40+ MANN filter)
11' VW Tiguan 2.0T (Castrol 0W30+OE filter)
15' Toyota Sienna AWD (Mobil1 5W30 EP+OE filter).
Re: 9000k service intervals. Should I change filter have way thru? [Re: wantboost] #5458889 06/21/20 01:45 AM
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edyvw Offline
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Originally Posted by wantboost
2015 s5 . Direct injection . Factory calls for 9000miles /15000km oil changes. Ive been changing half way thru to help with carbon build up as it Direct injection.
2015 audi s5.

My question is do I really need to change the filter also?

So, you are asking should you change a part that costs some $5-6?


11' BMW 328i xDrive 6MT (Pennzoil Platinum Euro 5W40+ MANN filter)
11' VW Tiguan 2.0T (Castrol 0W30+OE filter)
15' Toyota Sienna AWD (Mobil1 5W30 EP+OE filter).
Re: 9000k service intervals. Should I change filter have way thru? [Re: wantboost] #5458912 06/21/20 05:03 AM
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TiGeo Offline
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To spend the time to change your and not add the filter that costs a few bucks is silly TBH. Yes. Change the filter.


2018 VW Atlas SEL 4Motion 3.6 - Dealer Castrol 5W40 VW filter
2018 VW GSW S 4Motion 1.8 DSG Unitronic St2 IS20 - LiquiMoly Molygen 5W40 Mann filter
2013 Ford Focus SE HB 5-spd 2.0 - MC 5W20 MC filter
Re: 9000k service intervals. Should I change filter have way thru? [Re: Ihatetochangeoil] #5458940 06/21/20 06:45 AM
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4WD Online Confused
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Originally Posted by Ihatetochangeoil
Nothing that anyone says matters until you have UOA. You may find more info here: https://www.audiworld.com/forums/

There are many filters on the market that are rated far beyond 9K miles. FWIW, I've had enough UOA done that I've called Horizon testing and spoke to their lab director regarding "top up oil." He told me that when the TBN gets too low they just recommend a filter change. He said it's not really that the filter needs changing, the engine really just needs some top up oil. Hmmm. Why don't they just say so? If you're doing 4500 mile oil changes, you're throwing away perfectly good oil. (My two cents). I'll repeat: Nothing anyone says matters until you have UOA. Just do whatever lets you sleep at night.


On a DI engine I actually do that and spike the 0w20 with a quart of HD30 @ 4K and then go another 3K (no UOA) … 10 mins and $8 … A Fumoto could easily do this and keep filter.

Last edited by 4WD; 06/21/20 06:45 AM.
Re: 9000k service intervals. Should I change filter have way thru? [Re: wantboost] #5459000 06/21/20 08:31 AM
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MCompact Offline
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The turbo GDI I4 in my 2007 Mazdaspeed was rumored to have a significant issue with fuel diluting the oil. Numerous self-proclaimed “experts” advised a minimum OCI of 3,000 miles. Multiple UOAs revealed that a 7,500 mile OCI was conservative- at least when running Mobil 1 5W-30. It was still running great at 158,000 miles when I flipped it for the 2er.


Mine:
2014 M235i
2009 Cooper Clubman
1999 Wrangler Sahara
1995 318ti Club Sport

Wife's:
2015 X1 xDrive28i M Sport


Son's
2009 328i

Buy what makes you smile...
Re: 9000k service intervals. Should I change filter have way thru? [Re: MCompact] #5459007 06/21/20 08:36 AM
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Posts: 13,293
4WD Online Confused
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Subject matter experts are like a fixed Tomcat … they don’t do anything now, but still know all about it … 😷

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