For those that advocate 10K miles OCI

[Gene K]

Sounds like you've seen some analyses like that. Can you link to them or post them here? It would be a great help and a worthwhile addition to this discussion.

I've seen it a lot on the F150 Boards over the lsst decade. Guys tried to out OCI the fuel dilution in the Ecoboost and found it tracks with operating conditions not OCi length. They would shorten the OCI and think they had accomplished sometimg only to shorten it even farther and go right back where it was.That said I'm talking about a few percent, not a Honda 1.5T that is "making oil" to the point its pumping it out the dipstick.

You can prove it to yourself. Next time you make several short trips from a cold start the next morning pull the dipstick out and smell it. It will reek of gas. Then the next time you make a decent length highway trip pull it out the next morning and smell it. The gas smell will be minimal in comparison. That regardless of the OCI length.

 

[tolian21]

Assuming you occasionally get the oil up to temperature for an adequate amount of time you can't out OCI Fuel Dilution.

All the research I did shows that once oil is significantly diluted, one is not able to “burn off” fuel easily. Please provide sources that show that.

Please see UOA with 2.5% dilution and viscosity reduction from 0w-20 to something equivalent of 0w-10 at 7100 miles. The person used his car for short trips. If one does drive under these conditions long enough — some issues will develop. If it was my car driven under these condition — it would be getting oil change sooner.

 

[tolian21]

That said I'm talking about a few percent

Anything over 1% is too much IMHO

 

[2EHA]

Anything over 1% is too much IMHO

maybe in blackstonian numerals

 

[Gene K]

All the research I did shows that once oil is significantly diluted, one is not able to “burn off” fuel easily. Please provide sources that show that.

Please see UOA with 2.5% dilution and viscosity reduction from 0w-20 to something equivalent of 0w-10 at 7100 miles. The person used his car for short trips. If one does drive under these conditions long enough — some issues will develop. If it was my car driven under these condition — it would be getting oil change sooner.

I drive 2 miles to local business and back home several times and the fuel builds up. Take a 40 mi trip to the big city and back and it burns off (some of the heaviest compounds remain). I'm talking about a typical DI engine not one that's producing fuel to the point it's overflowing the dipstick. I have never had a car that produced a quart every 1,000 miles so I don't know what thats like.

 

[tolian21]

We going in circles here. Time to unwatch this thread.

 

[Pablo]

We going in circles here. Time to unwatch this thread.

I keep coming back.........like a fast train on a tight bend, starting to lean.............................and..................................................here comes a train going the opposite direction!

 

[Flyingdutchman]

How does the oil look at 15K or even at 10K? Like a diesel? That can't be all too good. And a modern engine should have no problem making it to 241k so that's not such a convincing argument. I like to see clean looking oil when I pull the dipstick and would change it if it doesn't, even at 5K intervals.

At 15k the oil comes out brown/goldish (See pic), if your convinced that a modern engine can easily make it to 240k on oem intervals then why do you want to change it every 5k intervals?

 

[atikovi]

if your convinced that a modern engine can easily make it to 240k on oem intervals then why do you want to change it every 5k intervals?

Because I get that warm fuzzy feeling when I see clean oil on my dipstick. Why do some people wash their car every week even if it's not too dirty instead of once a month? The paint will last 10 years either way.

 

[Flyingdutchman]

Because I get that warm fuzzy feeling when I see clean oil on my dipstick. Why do some people wash their car every week even if it's not too dirty instead of once a month? The paint will last 10 years either way.

Okay yeah if you like that then go for it. For me personally i dont see a lot of difference in the colour of the oil between 5, 10 or 15k ocis. After one or 2 trips it already turns to the colour of how it will come out 15k later.

 

[atikovi]

After one or 2 trips it already turns to the colour of how it will come out 15k later.

Well that's probably because of all the sludge and varnish inside the engine from the extended oil change intervals. I usually still see it this clean after 1000 miles,

 

[nobb]

Well that's probably because of all the sludge and varnish inside the engine from the extended oil change intervals. I usually still see it this clean after 1000 miles,

I suspect the engine design has more to do with it. I had an old Toyota V6 naturally aspirated engine with 400,000kms and the oil would look clean in the dip stick even after a few thousand kms. I also have a Hyundai 2.0 turbocharged engine owned since new and the oil has always turned dark almost immediately. I would assume a turbo is a lot harder on the oil.

 

[Flyingdutchman]

Well that's probably because of all the sludge and varnish inside the engine from the extended oil change intervals. I usually still see it this clean after 1000 miles,

View attachment 90426

This is how it looks inside.

 

[atikovi]

This is how it looks inside.

Pretty good, no sludge just some varnish.

 

[Quantico]

The problem with videos like this is, they don't present any data, just opinion. When you consider this "opinion" comes from someone who makes money from people paying him for car maintenance, it becomes suspect.
I say to each his own but always employ critical thinking and consider the source of all information.

The problem is that you can buy a new camry and change oil at 20k 40k 60k 80k and 100k and likely the car engine will still function. Might be higher oil consumption, but still run. People that buy new cars every 5 years will see that that 20k oil changes are fine.
I prefer 5 k oil changes and I have no proof how that has protected my engines. I have two vehicles with over 225 k miles with zero oil useage. And a ford modular having issues at 116 k miles.

So you can eat healthy and work out or walk daily and be a healthy weight. Or eat doritoes and be 100 pounds overweight and drink a bunch and appear to be fine at 50 years old.
I prefer to maintain my cars with 5000 mile changes and keep up on transaxle and diffs and transmission as well. Others do no service and get 100 k miles out of a car or truck and think how smart they are.

 

[PandaBear]

10K OCI has been around for what? 10 years now? If it is going to sludge up we will all know it by now like we know the GDI intake valve deposit problem, and specifically which engine too.

I'd not worry about 10k OCI but just save the money and plan for repair down the road, my guess is something on the car will go bad eventually and use that savings you get (i.e. $30 less every 10k because you do fewer oil changes) before your engine sludge up from 10K OCI.

 

[tolian21]

I'd not worry about 10k OCI but just save the money and plan for repair down the road

This is just a simple view. 10k OCI is not a one size fit all solution, there are specific engines and driving conditions that need to be accounted for.

 

[tolian21]

Pretty good, no sludge just some varnish.

Varnish is bad.

 

[atikovi]

Varnish is bad.

Well yes, but I didn't want to put him down and mention that as he seems to be proud of how the inside of his engine looked. This is what a 260,000 mile engine can look like if you do frequent oil changes.

 

[tolian21]

Well yes, but I didn't want to put him down and mention that as he seems to be proud of how the inside of his engine looked. This is what a 260,000 mile engine can look like if you do frequent oil changes.

View attachment 90567

This looks nice indeed! I know what he will say: “but my engine runs/ran fine and I saved a lot of $$$”