One Year OCI

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Surprised to see many car manufacturers saying one year OCI is ok if you have not yet exceeded OCI mileage. This applies to dino oil too. Just read a post on an Acura forum telling someone who only drives 3-4k per year, mostly short trips, to change at least once per year. I would think once per year is totally inadequate on dino oil with short stop/go driving. Am I behind the times? Thanks.
 
Not at all. When I see my Dad tomorrow for the holiday I'm going to be scanning/posting up his first UOA he has ever done, on a 2002 Acura MDX.

He used Mobil 1 Extended Performance 5w30, approx. 5,800 miles over a 1 year period, mostly short trips. UOA showed a TBN of 1.3, so not much life left in the oil at all. The UOA also showed high iron among other things, but that's obviously engine related even though it's a mystery to Blackstone at this time. I'll post that up tomorrow, at any rate.

However, Mobil 1 EP is designed to go 15,000 miles, or so they claim, and my Dad uses the Mobil 1 oil filters for good measure. I highly doubt dino oil with some cheap filter is going to do the job for a full year of short driving.
 
Originally Posted By: artbuc
I would think once per year is totally inadequate on dino oil with short stop/go driving. Am I behind the times? Thanks.

There is nothing about synthetic that makes it more adequate under such conditions. Both oils are as good or as bad in this case.
 
Originally Posted By: artbuc
I would think once per year is totally inadequate on dino oil with short stop/go driving. Am I behind the times? Thanks.


My thoughts are the oil's capability to handle fuel dilution makes the call. Hence, I favor HDEO or GC for that situation. Is that thinking sound?
 
Originally Posted By: BBuzecky
Not at all. When I see my Dad tomorrow for the holiday I'm going to be scanning/posting up his first UOA he has ever done, on a 2002 Acura MDX.

He used Mobil 1 Extended Performance 5w30, approx. 5,800 miles over a 1 year period, mostly short trips. UOA showed a TBN of 1.3, so not much life left in the oil at all. The UOA also showed high iron among other things, but that's obviously engine related even though it's a mystery to Blackstone at this time. I'll post that up tomorrow, at any rate.

However, Mobil 1 EP is designed to go 15,000 miles, or so they claim, and my Dad uses the Mobil 1 oil filters for good measure. I highly doubt dino oil with some cheap filter is going to do the job for a full year of short driving.


You managed to read the first part but failed to read the rest of it.

It clearly says: 15,000 miles or ONE YEAR, whichever comes first.

Seeing the TBN from the MDX after 5.8k and 1 year sounds about right. Time for a change, regardless of mileage.
 
Originally Posted By: Quattro Pete
Originally Posted By: artbuc
I would think once per year is totally inadequate on dino oil with short stop/go driving. Am I behind the times? Thanks.

There is nothing about synthetic that makes it more adequate under such conditions. Both oils are as good or as bad in this case.


Wouldn't a combination of higher quality base oils, higher TBN, and larger additive numbers that are typically found in synthetics improve resistance to oil breakdown due to fuel dilution and condensation?
 
Honda speced one year or 7.5K for years, with no mention of the need to use oils labeled as synthetic, only that they meet the viscosity and API spec required for the year of car in question.
Considering the number of seriously neglected Hondas running around, including those wearing the Acura badge, I wouldn't stress too much about oil or OCI on one, although I change mine every 5-7K, using synthetic.
 
Call me a dinosaur, but I favor 6 month OCIs (assuming the mileage is not exceeded first) over 1 year intervals. My reasoning is based on the conditions the oil is subjected to across 4 seasons when run on a 1 year interval, and that those conditions are hard enough on it to justify a 6 month cycle even when the mileage is low.

1 year may very well be feasible, but is it optimal? If you live in a region where there is not a lot of change between seasons, perhaps. But for the price of an oil change at either a quick lube or DIY, I prefer to spend that little bit more and keep to a 6 month cycle.

That said, were I go with the 1 year method I would do the OC in the spring. That way the oil is still in pretty good shape for when the winter beating comes, and is then changed out for fresh oil once winter is over.

-Spyder
 
Thought I recognized the name from the MDXer's forum. It was me over there. I was nervous about the one year OCI and had intended to change at 6 months. Well, extremely busy work schedule and poor health for a lot of the year lead to the year long OCI. I haven't ever done a UOA but the car seems to be good and engine looks fine.
 
Originally Posted By: BBuzecky
Not at all. When I see my Dad tomorrow for the holiday I'm going to be scanning/posting up his first UOA he has ever done, on a 2002 Acura MDX.

He used Mobil 1 Extended Performance 5w30, approx. 5,800 miles over a 1 year period, mostly short trips. UOA showed a TBN of 1.3, so not much life left in the oil at all. The UOA also showed high iron among other things, but that's obviously engine related even though it's a mystery to Blackstone at this time. I'll post that up tomorrow, at any rate.

However, Mobil 1 EP is designed to go 15,000 miles, or so they claim, and my Dad uses the Mobil 1 oil filters for good measure. I highly doubt dino oil with some cheap filter is going to do the job for a full year of short
driving.


Well mobil 1 has the best ad campaign money can buy. They have consumers like you believing their hype. If you want a brand of oil that lives up to is advertised claims buy Amsoil.
 
I have just did two 1 year OCI in a row:
- First one with PP 5W30 from May 2009 to May 2010, and only 4360 milles (basically public transpotation to work and errands in the weekend during summer time, drive to daycare then public transportation and errands for winters): TBN was still 8.96 at the end.

- Second one with Synpower from May 2010 to Apr 2011, and only 4200 miles (about same routine but with more drive to daycare routine as the new daycare was not easily accessible with public bus, less errands): TBN was still 3.67 at the end.

And remember that Nissan recommends 7500 miles or 6 months at best or 3750 milles or 3 months on severe service.

I don't see a problem going to few mileage one year OCI.
I would be more willing to do it with synthetic oil, but with easy-on-oil engine like Honda and Toyota, they should be able to achieve that with dino too.
You just need to experiment to yourself, your driving habits, routine, your car, to see what you have to do to achieve that.
 
Yea I believe it. My Kia's were similar.....err...actually I think they had 6 month/7500 intervals......and that's on "dino" - they didn't request/require Synthetics.....simply SAE 5W-20,5w30, or 10w30 depending on ambient temperature, and must meet SL.....leaves a wide array of oils open to choose from; whether it be dino or synthetic.
 
Originally Posted By: Quattro Pete
I wouldn't say that synthetics necessarily have higher TBN and stronger additive packages. It varies.

I agree you shouldnt fall intro the trap of calling all synthetics long drain capable. But (most VOA Ive seen with the past SM formulation) showed ~40% more Ca and or Mg additisation which should lead to better acid neutralization capacity which is paramount for long drain capability.
 
Last edited:
Originally Posted By: Clevy
Originally Posted By: BBuzecky
Not at all. When I see my Dad tomorrow for the holiday I'm going to be scanning/posting up his first UOA he has ever done, on a 2002 Acura MDX.

He used Mobil 1 Extended Performance 5w30, approx. 5,800 miles over a 1 year period, mostly short trips. UOA showed a TBN of 1.3, so not much life left in the oil at all. The UOA also showed high iron among other things, but that's obviously engine related even though it's a mystery to Blackstone at this time. I'll post that up tomorrow, at any rate.

However, Mobil 1 EP is designed to go 15,000 miles, or so they claim, and my Dad uses the Mobil 1 oil filters for good measure. I highly doubt dino oil with some cheap filter is going to do the job for a full year of short
driving.


Well mobil 1 has the best ad campaign money can buy. They have consumers like you believing their hype. If you want a brand of oil that lives up to is advertised claims buy Amsoil.


Thanks for the insight Amsoil fanboy. As I stated this was my Dad's Acura, as I don't even run Mobil oil personally.
 
Quote:
If you want a brand of oil that lives up to is advertised claims buy Amsoil.


And, IIRC, Amsoil is back peddling on it's long drain claims as well, are they not?
 
I have done 1 yr changes w MC 5-20 & Chevron Supreme 5w-20 on two mid 90 Honda 1.6L & a 03 Subuaru 2.5L running 4-7 K with about 80% urban driving, rest highway. Engines varied between 30 K to 150K. Blackstone anaylsis always said could go longer based on TBN & viscosity. I am completely convinced that 1 yr OCI with either of these oils is perfectly fine for most cars driven less than 7K / yr.
 
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