Automotive

Oil Change Interval Question.

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  • Oct 17th, 2015 10:18 pm
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Apr 30, 2015
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Oil Change Interval Question.

Pretty basic question, yes I should know this already.

Mechanic says I need to change my oil every 5000km, I never have (do my own oil changes).
Always do 8,000km.

Oil I buy says good for 12,000km

My car's owners manual says I can go 15,000km.

My car does not burn any oil, and I'm coming near my interval, and oil quality still looks good.

I drive over 1000km a week.

I also change my oil filter every oil change, however the Mobil1 filter I use says its good for 24,000km. Is it okay to start changing my filter every other oil change?

I use synthetic 5w30

Car is a 2001 A6.

All this taken into account? Which oil change interval should I be following, after 8000km, my oil dipstick still shows oil at the full mark as well.

-CanadaMaple
19 replies
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Oct 13, 2009
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My owners manual says oil changes using regular castrol every 16k km. I change it every 10 to be on the safe side. I'd say every 10k km should be good
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Think of the Childre…
Go by the manual.

WOULD SOMEBODY THINK OF THE CHILDREN!!!
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Jun 28, 2003
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We have a '06 X-Trail and a '11 Civic. I use synthetic for both and usually change oil at the 8K interval.

The Civic has an oil indicator on the dashboard so I also use it as a secondary source and usually change when it shows 10% oil life or 20%, prior to a road trip.
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Feb 9, 2003
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Langley
Change it as per the manual. Change the oil and filter every 15000km.
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Space
is the Audi turbo? Change the filter when changing the oil.
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Nov 30, 2011
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GTA
At a minimum, change it as per the manual. If you do a lot of city driving or other "rough driving conditions" change it sooner. If your wallet allows, or your love of your car demands it - change it more frequently. I would always change filter with oil change.
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Dec 9, 2008
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Toronto
I change my oil between 2000km and 3000km depending on weather and free time. And filter every 5000km. DIY and drop used oil at CT. Cost me $35 for 2 changes every 5000 km for conventional oil.
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Aug 2, 2001
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If you are going to change your oil every 5000KM then you should not be using synthetic oil - you are using a higher quality oil and filter, which allows you an extended drain interval. In my opinion, if you are wanting to keep using Mobil1 synthetic oil and Mobil1 filters, I would take the oil change interval to 15,000KM as per your manual. I would also be changing both the oil AND filter each time. It's a very small cost to replace the filter, and I don't understand why you would keep a dirty filter when you are already under the car draining the oil.
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Jan 27, 2006
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I don't know what it is but I just don't trust these Once a Year/15k+ oil change.

Is it because they charge $300 for it, their engine are superior or is it just laziness on both sides. Is this a special oil, better than Castrol German Synthec, Amsoil, etc.


At 15k is this like driving the car like a granny?
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[OP]
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SaskBerta
Solsearchin1 wrote:
Oct 17th, 2015 3:40 pm
is the Audi turbo? Change the filter when changing the oil.
bembol wrote:
Oct 17th, 2015 4:49 pm
I don't know what it is but I just don't trust these Once a Year/15k+ oil change.

Is it because they charge $300 for it, their engine are superior or is it just laziness on both sides. Is this a special oil, better than Castrol German Synthec, Amsoil, etc.


At 15k is this like driving the car like a granny?
TrevorK wrote:
Oct 17th, 2015 4:45 pm
If you are going to change your oil every 5000KM then you should not be using synthetic oil - you are using a higher quality oil and filter, which allows you an extended drain interval. In my opinion, if you are wanting to keep using Mobil1 synthetic oil and Mobil1 filters, I would take the oil change interval to 15,000KM as per your manual. I would also be changing both the oil AND filter each time. It's a very small cost to replace the filter, and I don't understand why you would keep a dirty filter when you are already under the car draining the oil.
Im going to stay with synthetic since thats what always has been used. I kinda felt the same way about the filter.. just noted that on the packaging it says its good for 24,000.

I drive on the highway every day, i don't accelerate hard, but I wouldn't say I drive like a granny either.

Part of me felt like using a 15000km interval on such an old engine, might be bad for it.

This isn't the turbo, 2.8L V6 C5

Most of my driving is highway.

300$? I use Mobil1... Do my own oil changes. Buying when on sale average costs me 60$ at the most. (car takes about 6.5-7 quarts)
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elkhaze wrote:
Oct 17th, 2015 3:58 pm
I change my oil between 2000km and 3000km depending on weather and free time. And filter every 5000km. DIY and drop used oil at CT. Cost me $35 for 2 changes every 5000 km for conventional oil.
I change oil everytime I use my car.

You're never too careful
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Dec 24, 2009
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elkhaze wrote:
Oct 17th, 2015 3:58 pm
I change my oil between 2000km and 3000km depending on weather and free time. And filter every 5000km. DIY and drop used oil at CT. Cost me $35 for 2 changes every 5000 km for conventional oil.
Are you babying your corolla
Deal Guru
Jan 27, 2006
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The only way to definitely tell the condition of your oil (how much "life" is left in your oil) is to send a sample away to one of those testing labs for a report. The report will detail the condition of the oil as well as indicate if they found any thing abnormal (ie high metal content from the engine - wear). Anything short of testing a sample of oil is really only a guess - even the owner's manual is a guess as they probably haven't done long term testing on your vehicle, using the brand of oil and gasoline that you do, and in the environment that you drive in.
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Nothing scientific but I have the 2.8 engine in my A4 and I do roughly every 10k given that I do mostly city driving so want to be on the safe side

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