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OCI, Owners manual versus oil Mfg. #5326148 01/18/20 10:06 AM
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VQLT Offline OP
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If my car owners manual recommends 5000 mile oil changes, is there any benefit to using a 10,000 mile oil? In other words, if I use the 10,000 mile oil can I extend my oil changes to 10,000 miles regardless of what the owners manual says?

Re: OCI, Owners manual versus oil Mfg. [Re: VQLT] #5326155 01/18/20 10:10 AM
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PimTac Offline
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The oil may say it’s good for 10,000 miles but only if the engine will allow it.

The certain way to determine this is to use analysis. On the other hand if your car warranty dictates 5k oci then go with that for now until the warranty is up.


2017 Mazda CX5
Valvoline Advanced Synthetic 0w20
Roki OEM filter.
Re: OCI, Owners manual versus oil Mfg. [Re: VQLT] #5326159 01/18/20 10:14 AM
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VQLT Offline OP
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Warranty is up. Car is 15 years old

Re: OCI, Owners manual versus oil Mfg. [Re: VQLT] #5326163 01/18/20 10:19 AM
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simple_gifts Offline
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I'd hate to be your doctor; Car, engine, miles and driving style please


2004 Prius; 126K; ALM
2007 Yaris 103K ATM
2006 B2300;137K;ALM


Was driving an ox cart; Now on the USS Enterprise
Re: OCI, Owners manual versus oil Mfg. [Re: VQLT] #5326215 01/18/20 11:17 AM
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BigCahuna Offline
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I've gone both way with oil changes. Sure the oil can go 10k, but you have to wonder if the filter can. Or if it's doing anything useful. Changing the filter at 5k might be more beneficial then changing the oil. Also how you use the you car has alot to do with oil life. If you tow a trailer, go only around town with little to no warm up, if you do only high speed highway driving, all effect longevity. Oil analysis is the only way to tell if your oil can handle the way you,and the vehicle treat it .,,

Re: OCI, Owners manual versus oil Mfg. [Re: VQLT] #5326219 01/18/20 11:24 AM
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Railrust Offline
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Most manufacturers are over 5,000 miles nowadays...I think if you’re out of warranty, do whatever you feel comfortable with. Find that sweet spot. For me that’s 5,000 miles. For whatever reason when I try to extend an oil change up into the 7,500 miles stratosphere, I tend to consume too much oil. It’s like something halogens at that 5,000 mile mark...don’t know if it shears or what, but I use a lot more after 5k. So I don’t bother going further.


2018 Chevy Silverado 5.3
2007 Lexus LS460 (deceased)
2008 Honda CRV
(Whatever synthetic oil is on sale or rebate)
Re: OCI, Owners manual versus oil Mfg. [Re: simple_gifts] #5326226 01/18/20 11:28 AM
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Triple_Se7en Offline
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Originally Posted by simple_gifts
I'd hate to be your doctor; Car, engine, miles and driving style please

Plus VQLT.....
How long have you had the vehicle?
How many miles do you drive this vehicle per year?
Is your engine dirty?
(example) On all my vehicles dating back 40 years, my dipstick stays relatively clear for up-to 1K after an oil change.

Lastly, older vehicles (yours 15 years) generally begin to see shorter OCIs, not longer ones. Like an aging parent in retirement, they need more TLC.


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Keepa' Ya' Pistons, Valves & Injectors Clean
19' Hyundai Santa Fe 2.4 GDI / 20' Kia Soul XLine 2.0 MPI - both Pennzoil Ultra Platinum 5W30 Mobil1 Filters



Re: OCI, Owners manual versus oil Mfg. [Re: VQLT] #5326254 01/18/20 11:55 AM
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JMJNet Offline
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What car makes and model are we talking about?
Or are we just talking hypothetically on a 15 years old car?


  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: OCI, Owners manual versus oil Mfg. [Re: BigCahuna] #5326262 01/18/20 12:09 PM
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NH73 Offline
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Originally Posted by BigCahuna
Sure the oil can go 10k, but you have to wonder if the filter can.

Yeah, there are filters that claim 10,000 miles to 20,000 miles. If your engine still clean, you should be able use one of those filters.


2017 Toyota RAV4 Hybrid
2004 Ford Explorer Sport Trac
2012 Gravely ZT XL 48 w/ Kawasaki FR730
Re: OCI, Owners manual versus oil Mfg. [Re: VQLT] #5326314 01/18/20 01:08 PM
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VQLT Offline OP
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I was mainly talking hypothetically or in general but the two specific cars are a 1999 Saab 9-3 and a 2006 Scion XA
I’m assuming when these cars were made there was no such thing as a 10,000 mile oil therefore it would not have been an option in the owners manual

Re: OCI, Owners manual versus oil Mfg. [Re: simple_gifts] #5326330 01/18/20 01:22 PM
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blupupher Offline
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Originally Posted by simple_gifts
I'd hate to be your doctor; Car, engine, miles and driving style please

This.

I have done 10,000 mile intervals on a 5,000 mile spec vehicle (I was driving 99% highway miles), and I have done 3,000 mile intervals on a 7,500 mile spec (all local short trips).
Some engines are better than others with extending the interval, others need to have it shortened.
Some driving styles/conditions allow the interval to be extended, some do not
Engine condition makes a difference as well.

So I will answer your vague question with a vague answer: Maybe


'18 Santa Fe: PP 10W-30/OEM
'18 Soul: Synpower 5W-30/PG
'10 Santa Fe: Synpower 5w-30/D+
'04 F150: Magnatec 10w-30/ST
'12 xB: M1EP 0W-20/CQ Blue
'02 F150: Magnatec 5W-20/D+
'94 VT1100: Peak 15W-40/D+
Re: OCI, Owners manual versus oil Mfg. [Re: VQLT] #5326357 01/18/20 01:45 PM
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NH73 Offline
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Originally Posted by VQLT
I was mainly talking hypothetically or in general but the two specific cars are a 1999 Saab 9-3 and a 2006 Scion XA
I’m assuming when these cars were made there was no such thing as a 10,000 mile oil therefore it would not have been an option in the owners manual
My father in law ran 10,000 mile oil changes already back in the 1980's. No engine problems he would claim. He bought Dodges.


2017 Toyota RAV4 Hybrid
2004 Ford Explorer Sport Trac
2012 Gravely ZT XL 48 w/ Kawasaki FR730
Re: OCI, Owners manual versus oil Mfg. [Re: VQLT] #5326394 01/18/20 02:46 PM
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bullwinkle Offline
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Originally Posted by VQLT
I was mainly talking hypothetically or in general but the two specific cars are a 1999 Saab 9-3 and a 2006 Scion XA
I’m assuming when these cars were made there was no such thing as a 10,000 mile oil therefore it would not have been an option in the owners manual

The xA can do it, providing the oil isn't shear prone-the '06 xB in my sig has had UOA confirmed 10K M1 5W30 EP oil changes, but M1 0W30 AFE sheared badly into a 20 weight in 7000 miles. As long as the engine is clean, build up to it gradually with a few OCIs, cutting open oil filters to confirm cleanliness, and do a UOA to make sure your oil can handle it. I don't know enough about Saab to have any idea, but I hear they're expensive if they break.


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Re: OCI, Owners manual versus oil Mfg. [Re: PimTac] #5326395 01/18/20 02:49 PM
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JLTD Offline
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Originally Posted by PimTac

The certain way to determine this is to use analysis.


ONLY way. Anything else is guesswork.

Manufacturer usually sets lower distance since people forget and a UOA is beyond most peoples' ability or interest. Oil advertising and capability dictates what you see on the claimed mileage per OCI.

Engines vary. Driving styles vary. Temperatures vary. That's why a UOA is the only way to be certain about your oil's condition, in YOUR engine with YOUR climate and YOUR driving habits.


Lates.
Re: OCI, Owners manual versus oil Mfg. [Re: VQLT] #5326415 01/18/20 03:27 PM
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Mad_Hatter Offline
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Originally Posted by VQLT
I was mainly talking hypothetically or in general but the two specific cars are a 1999 Saab 9-3 and a 2006 Scion XA
I’m assuming when these cars were made there was no such thing as a 10,000 mile oil therefore it would not have been an option in the owners manual

Can you do extended drain intervals? Sure, it's your car.. you can do whatever you want to it. The better question is... "should i do extended drain intervals?" 😉 As has been mentioned, oil analysis, while not a perfect tool, is the only real objective tool at your disposal to answer that question.

Last edited by Mad_Hatter; 01/18/20 03:29 PM.
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