"Never change your oil" guy selling his 240D! - Page 14 - PeachParts Mercedes-Benz Forum

240Joe · #**196** 12-18-2007, 04:28 PM

Quote:

Originally Posted by pawoSD

Some may say its not true, but I swear I can tell that the engine (and tranny too) run smoother and quieter with fresh oil in them. You can just tell.

Yes, it's called the placebo effect.

google it.

240Joe

Cervan · #**197** 12-18-2007, 06:56 PM

Quote:

Originally Posted by pawoSD

I wonder how many 240's can run at 85mph constantly....you're near the redline there! Not to mention thats 15-20 over the speed limit in all US States...

.

Also, MB says to change the oil. So do it. Somehow I can guarantee the engineers that designed the car and engine know more than you. A whole lot more. And they say to change it, thus, probably a wise idea.

i drove my 4speed 1981 240d from california to washington going 85 the entire time on i-5 didnt burn a drop of oil and it actually run better now than before. Of course it was just rebuilt

bustedbenz · #**198** 12-18-2007, 11:28 PM

Quote:

Originally Posted by 240Joe

Yes, it's called the placebo effect.

google it.

240Joe

As a matter of fact, hydraulic lifters in nearly-worn-out cars become noisy and clattery as the oil gets thick and dirty and can't lubricate as well.

When you put fresh oil in, those lifters stop being starved for oil, and they do indeed sound smoother and quieter than they did when they were wearing themselves out on the other parts that they knock against instead of simply using the lubricating oil to preserve themselves.

Skid Row Joe · #**199** 12-19-2007, 12:05 AM

Quote:
Originally Posted by pawoSD

Some may say its not true, but I swear I can tell that the engine (and tranny too) run smoother and quieter with fresh oil in them. You can just tell.

Quote:

Originally Posted by 240Joe

Yes, it's called the placebo effect.

google it.

240Joe

Either that Joe, or, he would be good sitting on the U.S. Supreme Court..............LMAO!

#**200** 12-19-2007, 12:21 AM

*about a post from SRJ that was removed by the mods*
Wow, you really are ignorant of what oil does. You really cleared things up with that lost post SRJ. Now we know for sure we shouldn't believe what you say about oil

Soot has no advantage of any kind in oil, it especially has nothing to do with the valves.

Skid Row Joe · #**201** 12-19-2007, 12:40 AM

Quote:

Originally Posted by 240Joe

A 240D running nearly constantly at 80 to 85 mph will use about 1 quart in 600 to 1000 miles. If you don't believe me, look it up.

Say you drive 12kmiles a year or 1kmile a month, and add a quart a month...and the engine holds 8 quarts. Say that soot is added to the oil at about 0.15% per 1000 miles...which has been confirmed by many oil samples.

It can be shown with a little math (and I'll leave that for an exercise) that the concentration of soot can never get higher than .15/.125 or 1.2%.

If soot is added at .2% per 1000 miles, which is very high, then you'll never get above .2/.125 or 1.6%.

A good synthetic diesel grade oil can easily handle 5% soot...and some 10%.

And now you can do the math for other combinations....say adding oil only once every 2 months or 2kmiles. Even with the .2% soot added every 1kmiles, you can't get over 3.2% soot....ever.

So, to sum up....if you have to add at least a little oil to the engine, and you change the filter once a year (this analysis excludes the oil you lose when you pull the filter out...but it would only make the numbers better), you can probably drive it forever.

Fire away.

240Joe

True, Joe.

Several years ago, I started changing my synthetic crankcase oil every two years. I have no doubt that I was over maintaining it, i.e. wasting money on high priced synthetic oil. I am moving my numbers up, way up on oil change frequency.

There is no data to support the wild claims of "bad things happening," individuals here make on frequent oil change schedules. None.

#**202** 12-19-2007, 12:54 AM

Quote:

Originally Posted by Skid Row Joe

There is no data to support the wild claims of "bad things happening," individuals here make on frequent oil change schedules. None.

Except every engine/vehicle manufacturer that sets a specific oil change interval for their vehicle. Find me a single manufacturer that says anything along the lines of "change the oil whenever you feel like it" or, "There is no need to change the oil".

Skid Row Joe · #**203** 12-19-2007, 01:23 AM

Then, kindly post links to Mercedes-Benz' test data that will support your controverting claims that; "Soot blows-up engines." --It doesn't exist, friend.

#**204** 12-19-2007, 01:28 AM

Quote:

Originally Posted by Skid Row Joe

Then, kindly post links to Mercedes-Benz' test data that will support your controverting claims that; "Soot blows-up engines." --It doesn't exist, friend.

Quit avoiding your due humiliation. Nobody ever said soot will "blow up" an engine, it will wear it out quicker.

Now, point out a single manufacturer that supports your "never change the oil" regimen.

greasybenz · #**205** 12-19-2007, 01:30 AM

I wonder if 240joe is just messing with us about his not changing oil thing. I see the 240joe screen name over on the bob is the oil guy forum asking questions about diesel oils for a 240D. Id love to hear the amount of responces he would get if he told everyone over there he was never changing his oil again!

hmm........

Skid Row Joe · #**206** 12-19-2007, 01:46 AM

Quote:

Originally Posted by ForcedInduction

Quit avoiding your due humiliation. Nobody ever said soot will "blow up" an engine, it will wear it out quicker.

Now, point out a single manufacturer that supports your "never change the oil" regimen.

Humiliating, isn't it.......making claims you can't back up........ Cant'cha find any linkable data to support your soot-thingy?

What "never change the oil," regimen?

#**207** 12-19-2007, 02:04 AM

Quit trying to change the subject and get to linking.

#**208** 12-19-2007, 02:11 AM

Since you are incapable of trying to prove your point, read if you can: http://fpc1.com/tests/ftc/ftpl/tb108-97.htm

Quote:

the presence of soot can create abrasive wear, if it bridges the minimum lubricating oil film thickness, and interferes with the metal-to-metal clearance. The more soot, the greater the potential for wear.

The presence of soot will be most damaging during start-up.

http://www.machinerylubrication.com/article_detail.asp?articleid=1033&relatedbookgroup=Lubrication

Quote:

Soot
Soot is a by-product of combustion and exists in all in-service diesel engine motor oils. It reaches the engine by various means of blow-by during engine operation. While the presence of soot is normal and expected for a given number of miles or hours of service on an engine oil, the concentration and state of soot may be abnormal, signaling a problem with the engine and/or a need for an oil change. Following are some issues related to soot contamination:

*Combustion efficiency is directly related to the soot generation rate. Poor ignition timing, restricted air filter and excessive ring clearance cause high soot load. Combustion problems are not solved by an oil change.

*New diesel engines designed for lower emissions have higher injection pressures. This corresponds to increased sensitivity to abrasive wear (for example, from soot) between rocker, shaft and rocker bearing and can lead to rocker arm seizure. New exhaust gas recirculation (EGR) units on diesel engines amplify the amount and abrasivity of soot production.

*Viscosity increases with soot load. However, high dispersancy associated with some modern engine oils may increase viscosity with soot even more. High viscosity corresponds to cold-start problems and risk of oil starvation.

*Soot and sludge in engines deposit or separate from the oil in the following areas, all presenting risks to engine reliability including rocker boxes, valve covers, oil pans and head deck.

*Deposits on engine surfaces interfere with combustion efficiency and fuel/oil economy.

*Soot polishes off protective antiwear soap films in boundary zones such as cam and cam-follower zones.

*Carbon jacking from the buildup of soot and sludge behind piston rings in grooves can cause rapid wear of rings and cylinder walls. This can cause broken or severely damaged rings during cold-start conditions.

#**209** 12-19-2007, 02:12 AM

Hey Forced, maybe we should start selling oil with extra soot as an additive to get rid of all that pesky carbon in the engine. What a plan, I know where we can find some slightly used oil with plenty of soot.

But wait, soot is made up of carbon particles, I wonder how that would work? Maybe we should just use sand instead, that should clean everything up really well. Everyone knows that oil should be a little gritty.

This would all be pretty amusing if not for the risk of some poor sucker actually believing this nonsense.