Changing oil not Necessary

[some_other_dave]

Originally Posted by Artan

...They say so but as soon as you turn the car on the oil will be heated up, small amount of water perticles will be removed (evaporate). Although water does not mix with oil but even if it stays in the oil that is a very small amount of it. That is almost zero.

Water does, in fact, mix with oil. Google "emulsification". Also look on the oil cap of any car that is driven only for short periods of time. The "cheese" you see on the cap is a mixture of oil and water.

Oil takes a while to get up to operating temperature where the water can outgas. I have heard a rule of thumb is that the oil takes twice as long to get to operating temp as the coolant does. Check into an oil temperature gauge if you want to see this illustrated.

As for the "almost zero" idea, well I guess we go back to the argument about suspended particulates. And you contend that you can feel anything that is large enough to matter--which is pretty good, since I don't think most of us can feel a particular 0.001" in size through a film of oil.

-soD

[Ford Man]

At an average of 40 MPH my '88 Ford Escort with 518,400 miles would have ran 12,960 hours using regular oil changes (dino). No, it hasn't been ran at WOT all this time, but about 12 years ago I was driving 125 miles a day to and from work for about a year and about 75 miles of this was 4 lane and interstate driving. During the 75 miles of 4 lane/interstate driving 80-90 MPH (approximately 4,000-4500 RPM) was pretty common 5-6 days a week for a year on an engine in excess of 300,000 miles at that time with no oil related problems.

Lets figure the rpm's on my engine. At the 40 MPH average, total hours ran 12,960 x 60 = 777,600 minutes of running time. 777,600 minutes x 2,000 rpm's (estimated) = 1,555,200,000 revolutions with no rebuilds. My 1.9L 4 cylinder engine using the lower grade motor oil (dino) with regular changes has made over 1.5 billion revolutions. So my engine has almost 31.85 times the revolutions on it that your example has. I'm not comparing my type driving to the type driving they did in the test but just comparing stokes of the piston which equals wear. Even at today's oil prices doing it myself costs about $12. per oil/filter change or $.0024 per mile on a 5000 mile oil change interval. I think even you would agree this is pretty cheap insurance for your engine. Even if your engine lasted 250,000 miles with no oil changes at a replacement cost of $2,500. (under estimated, probably closer to $5,000.) that would be a cost of $ .01 a mile. At 518,400 miles at today's price of $.0024 per mile I've spent $1,244.16 on oil/filter changes, less than 1/2 what I estimated a replacement engine at and mine is still running. You may argue I've used 105 gallons of oil unnecessarily, but used oil can be recycled and reused.

Since I started my fuel log over 45,000 miles ago my average MPG has been 41.54 MPG, so using this as a lifetime average on my car I've burned 12479.5 gallons of fuel or approximately 47,235 liters.

I'm personally not impressed with a car engine running 148 hours at WOT. Even small lawn equipment engines run at WOT, the current hours on my riding lawn mower engine 20HP Kohler is over 500 with 50 hour change intervals on an air cooled engine that commonly sees 3+ hours of continuous use at WOT.

When I see you sitting on the side of the road, because you've failed to properly maintain your engine I'll drive by in my Escort and give you a wave!! I've also driven one car without regular oil changes for over 30,000 miles, because it was using a lot of oil and the car was in poor condition, but in that 30,000 miles of driving I noticed the oil consumption increased from about a quart every 500 miles to a quart about every 300 miles a 66.7% increase in oil consumption in 30,000 miles.

[user removed]

They ran 64 Mercury Comets 100,000 miles at 100 MPH. 40days and 40 nights on the banks of the Daytona Speedway. 1000 hours.

Wasting your time trying to convince a genius who cherry picks his facts to support his predetermined conclusion.

Pray tell artan, what is the highest miles you ever achieved on a single vehicle?

Especially using your "facts ignored" newly conceived maintenance regimen.

What a waste of energy.

regards I guess
Mech

[t vago]

Can this thread go into the unicorn corral now? Please?

[Ladogaboy]

Originally Posted by t vago

Can this thread go into the unicorn corral now? Please?

Hah! I'm starting to think this thread will last longer than Artan's engine!

[Artan]

I know it is diffcult or impossible to convince people that the oil should never be changed but if you use common sense analyzing things you will see that the facts are in front of you and they are very simple, but because they are so simple you are ignoring them expressing disbelieve.

It will take a while until i can prove this with my own car but this is a private test and people may not believe it. I dont care for that. I feel pretty confident that i am right and the facts are on my side.

[user removed]

But dear Artan you ignore the facts in front of you, while the rest of us see them clearly.

Self induced ignorance+complicated mechanical systems=unnecessary repairs and premature failures.

Lets see if you can find a single person on the forum that thinks you are correct. Increased change intervals? Sure, if you PROPERLY test your used oil samples and it shows more useful life in the oil.

Do a blind test and see if cooking oil passes your "test". Put some of that in your engine and see how long it lasts!

regards
Mech

[Daox]

The continuation of this thread is obviously futile and the entire concept is just rediculous. I think we've all had enough.

People, follow your manufacturer's recommendation on oil changes and everyone will be happy.