What is my real OCI if I burn 1 quart/1000m

[ordinarybloke]

I've searched this forum so I'm sure the subject has been extensively covered somewhere here, but I can't find it.

I run a 1999 Volvo V70 Bifuel (Factory CNG) with only 115,000 and change the Valvoline Maxlife Fully Synth every 5000 miles (I think our miles are the same as US miles,it's the Queen's gallon that's different), however with it burning roughly a US quart every 1000 odd miles, by the tiem I've got to 5000 miles (with a 6.1 US quart sump cap.) I've pretty much done an oil change, or at least a very decent flush. I do few trips under 20 miles. Many over 100.

So gents, how do I work out my actual OCI. I'm sure I could stretch my OCI out to far more than 5000 miles. Nearer 10,000 methinks. Afterall the majority of the oil in there is new, and I run CNG.

Also oil here is pricey. 6 qts Fully Synth Mobil 1 costs USD75-85.00 here if you shop around. More otherwise, and don't get me started on our Petrol prices. You get Petrol given to you!

Is there a quick way to work out my real OCI?

 

[Shannow]

Not really, you can work out an "average" oil age, and extend until you reach your target...your useage is pretty OK for that, and CNG is even better.

Food for thought was the Mobil 1 life test that too an oil sample very 1,000 miles and tracked what was left...

http://www.brianschreurs.org/neptune.spacebears.com/cars/stories/mobil1.html

I don't think you will ever wear your M1 out, if you change your filter and run CNG.

 

[ordinarybloke]

Thanks for that, I was about to get the pocket calculator out. I quoted Mobil 1 because of its price here in the UK. Valvoline MaxLife Full Syth can be got for USD55-60.00.

As i see it, I'm effectively doing roughly a 20% flush every 1000 miles with Maxlife, that has to help. Except it is not strictly a flush.
If only I was ejecting the cr*p with what I'm now burning it could be argued I should never need to cahnge my oil, unfortunately...

I see a flaw in that plan. Calculator and percentage key it is then...

 

[ordinarybloke]

I have to say since I did a BG109 flush, my Maxlife now comes back out almost clear. It runs petrol only at start-up and if I go over my 210 mile CNG range.

 

[Shannow]

Given that you are 1 litre per 1,000 miles, then the oil is going somewhere "mechanical", valve guides, rings, leaks etc. and probably taking most of the rubbish with it.

Filter changes every so often, and you really should be laughing.

Mobil will give you 20,000km/12 months on the 1999 Bifuel for M1.

Seems like 12 months on something like Delvac MX would get the corn on the cob done while leaving some money in old the sky-rocket.

 

[ordinarybloke]

'Sky-Rocket' 'Corn-On-Cob' Thanks Mary Poppins, but your **** Van Dyke impression, might need some work

Trust me on this, I'm best staying away from sounding Yank!

20,000km is a lot. OK...

 

[Shannow]

Actually, rhyming slang is used in this district, long after the pit ponies were gone... we get the occasional monkey hanger passes through.

 

[ordinarybloke]

Rhyming slang Stateside, now I didn't know that. It has all but died-out here and where it is used, it is a moving language, so whilst 'sky-rocket' might be understood... just, by some. Most would look at you blankly. In use it would have been shortened to 'Sky". And rhymes go in and out of use, almost yearly. The only one I know in common and consistent use is "Bottle", (how much nerve you have) and that comes form 'Bottle and glass" and the swear filter on here would defeat me giving you its full and more colourdful origins.

As for OCI, it seems there is a culture non-existent in the uK for 3000 OCI, but perhaps that is because our cars rot before they wear out. Your avergae Brit only does 10-12,000 miles a year at most, we scrap at 10 years often with no more than 120K on the clock.

Now if you speak to anyone Britside adn say 'Bottle' they'll know what you mean. Has your Bottle gone? Where's your Bottle?

 

[bigt61]

I would switch to MaxLife semi-synthetic - it should be cheaper and may slow the leak/usage better than the full synthetic. If the usage persists at 1 qt per 1000 miles, I'd change the oil and filter every 20,000 miles.

 

[Shannow]

Originally Posted By: ordinarybloke
Rhyming slang Stateside, now I didn't know that.


No mate, I'm in the colonies...we give a Friar Tuck !!!

 

[CHARLIEBRONSON21]

With stats like that I'd change filter and top off and continue with whatever I was doing.

 

[armos]

Each time 1 quart is burned and replaced, it will leave 83.6% of the old oil (5.1/6.1).
After 5 single quart topoffs, this should leave 41% original oil.
After 10 quarts / 10k miles, you would in theory have 17% original.

My concern would be that if any of the oil starts to thicken up, that component of the oil may be the least likely to ever disappear unless it's fully drained.

 

[supton]

My concern would be, if it's burning it, is it from valve guides or rings? If it's from the rings it's often got blow-by at the same time. And there is junk floating in the oil at the same time.

That said, this is running on CNG, which should burn cleaner. Seems early to be an oil burner at 115k though.

 

[Kuato]

After reading the thread then rereading the original post:

Full synthetic. Burn 1L every 1000 miles, replacing more than 80% of the oil in 10k. With a good quality filter you should easily be able to go 10000 miles without worry, and possibly much further with a UOA. Have you done any sort of UOA? That is where I would start.

 

[ordinarybloke]

As it happens I've been wondering where my oil is going so i did a compression test and got fantastic numbers. on all 5 cyls. Ranging 218 to 223, this is a non-turbo car.

I'm Britside of the pond, whilst I'm sure I could get a UOA done here, it is something that is not part of motoring culture in the UK. Likely because (with the exception of business users) the standard-issue Brit does not do the miles your standard-issue Yank does. I patrolled a used car lot stateside once, you put gallactic miles on vehicles, we would wrongly consider scrap, so it would appear you have a culture of looking after engines to achieve it. I'm very much the exception (for a Brit) and do 25,0000+ a year.

I've no real idea of the prior history of this vehicle, I took it over at 80,0000, and it was burning oil then. I need to look at valve stem seals I think.

You wrote: After 10 quarts / 10k miles, you would in theory have 17% original.

Yes and that 17% will have all the nasties, now spread in with new oil, but as i thought, my current OCI is a excessive, and wasteful, not even minding how much we pay for oil here in the UK. I gather in most of Europe oil is also as pricey.



Correction, I don't give a "Friar Tuck"? or better, "You don't give a "Tom T*t"

BTW: It's not foggy in London. WW2 started in 1939 and it's not the 'World Series (no one else plays it), and you lot were very silly to throw that tea in the river. So there.

 

[Shannow]

We won the ashes !!!

 

[ordinarybloke]

================================

Quote: No mate, I'm in the colonies...we give a Friar Tuck !!!

================================

You're all in the colonies, it's just that the Antipodeans are more pleased to know it. Whilst we give 'em an easy ride really, we need to gee-up the Yanks once in a while, lest they persist in their belief that the US is the world.

 

[Kuato]

Originally Posted By: ordinarybloke
....in their belief that the US is the world.



This narrow mindset is amazingly prevalent. I often get asked, "Why do you want to go to Europe? We have everything here." Ignorance. /rant

As far as the 17% having all the bad stuff remaining, it is certainly possible. Since your amount of miles driven is less UK and more US, a UOA will tell you if your "nasties" (LOL) are there or have been safely diluted.

I don't know offhand if Blackstone will mail kits overseas but if they won't, send me a PM and I'll be happy to mail you one. With oil being expensive, the nominal cost of the UOA ($30US) will be well worth it.

 

[ordinarybloke]

Originally Posted By: Kuato
Originally Posted By: ordinarybloke
....in their belief that the US is the world.



This narrow mindset is amazingly prevalent. I often get asked, "Why do you want to go to Europe? We have everything here." Ignorance. /rant

As far as the 17% having all the bad stuff remaining, it is certainly possible. Since your amount of miles driven is less UK and more US, a UOA will tell you if your "nasties" (LOL) are there or have been safely diluted.

I don't know offhand if Blackstone will mail kits overseas but if they won't, send me a PM and I'll be happy to mail you one. With oil being expensive, the nominal cost of the UOA ($30US) will be well worth it.


When i first encountered 'Average Joe Yank' I thought the insular mindset was an isolated thing, but no - it is all pervasive. Your TV news CBS, FOX, CNN is so insualr. I could quote you dozens of examples, but the universal one is 9/11.

The Luftwaffe, the RAF (and it has to be said your lot too) did more in any one raid, to Europe's cities, than that little tickle. Sorry, not to downplay such an event too much, but in that instance, unlike us, you were really surprised.

The world knocked on your door, [agreed, very hard] and your nation reacted to that shock, rather the actual event. You see, the world had never come to your door before, I think it was news to your average Yank that the world does not like us (By us I mean the English-speaking world) I read that only 10% of you have passports. There is a world out there and it is Mahoosive, and it will not want to subscribe to the American way.

The reaction to that event has changed our world, more than the event could have done. That insular approach has cost us all.

You appear to be an unusual American in that you seem to already know that.

Thank you for your kind offer of a UOA pack, I've looked and it is something not easily accessed here outside of race engine development, so pricey. But if I keep my oil clean i'll be OK.

 

[TFB1]

Assuming it doesn't have a major blowby issue, at 1K per qt you could no doubt run it at least 20K mi maybe more... I'd toss a new filter on it half through the run at a qt low then add two...

I run both my Grand Marquis for 1yr or 10K mi on M1, one uses no oil while the other will need a qt at around 4500mi...