stupid people vs luxury cars

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Originally Posted By: artificialist


And I still believe no engine should be burning any oil. Oil burning to me is a sign of bad design.


You are aware that if an engine lubricated by oil, did not burn any oil, said engine would not be being lubricated by said oil.

The oil and compression rings glide over the layer of oil...if the didnt, and scraped it all off...there would be no lubrication.

All engines burn oil. If youre oil level stays exactly the same, I'd bet a cojple of bucks it has higher levels of fuel in it than the same car which uses a cup or two over an OCI.
 
Wrong, and completely disproved in our fleet.

Example: 2013 3500 Chevrolet van, 6.0 gas motor. 3,255 miles and over 200 hours of stationary ops at 1550 rpm last WEEK!. Not a visible change on the dipstick. None. Oil is 5w-30 dexos by Mobil 1.

2006 Chrysler 6.1 liter 425 hp SRT8. 92k miles, has never changed the oil level at any time, despite over 200 1/4 mile passes and multiple track days at road courses all over this country. Oil temps over 300 degrees at Homestead in the summer! Oil is M1
0w-40 per the factory recommendation.

I have other vehicles, too many to list. The only one that burns any measurable oil is a 170k mile unit that has been working hard since 06 in my fleet. All these vehicles have had OA's and fuel contamination is negligible.

At least with respect to pushrod V8's there is no reason to automatically assume they use oil. Some do and some don't. Most that do have had 'babied' break in and do not get worked hard enough to load the rings and wear in correctly when new. Low tension rings mean some trade offs...
 
Originally Posted By: SteveSRT8
Wrong, and completely disproved in our fleet.

Example: 2013 3500 Chevrolet van, 6.0 gas motor. 3,255 miles and over 200 hours of stationary ops at 1550 rpm last WEEK!. Not a visible change on the dipstick. None. Oil is 5w-30 dexos by Mobil 1.



Do you have UOAs to prove there is no fuel dilution at the end of OCI?
 
Originally Posted By: SuzukiGoat
All engines burn oil.


This is correct. Every engine consumes oil. Not only are pistons and rings lubricated by the oil on cylinder walls (which will naturally be consumed), but the valve stems and guides are lubricated by oil. This lubrication eventually moves downhill and is consumed in the combustion chamber. An engine with more valves will generally consume more oil than one with fewer valves...fewer valve guides mean fewer areas exposed to the combustion chamber.

Not consuming oil and consuming such a small amount that the level on the dipstick never changes are two different things.
 
Originally Posted By: SteveSRT8
....

At least with respect to pushrod V8's there is no reason to automatically assume they use oil. Some do and some don't. Most that do have had 'babied' break in and do not get worked hard enough to load the rings and wear in correctly when new. Low tension rings mean some trade offs...



That's interesting, Steve. All my twenty first century cars consume no measurable quantities of oil, and I broke them in as per manuf. specs - as I have done with every new car I've owned. Never made any sense to me to flog something just to seat the rings.

Worst oil user I ever had was a Honda CVCC ( what a piece of trash ) and a Lycoming. That Lyc would toss off the first quart of heavy Aeroshell in a couple of hours.
 
Originally Posted By: rslifkin
In theory, they all use oil. However, in some, it's so little that you'll never see the level change.

Agreed. The sump capacity of the E430 is 8.5 quarts = 270 oz. It consumes less than 6-7 oz in 10-13k miles OCI, not measurable on dipstick nor in the container of Mityvac 7201.
 
I think I hurt my neck, I was shaking my head so hard while reading the first post.

Never, ever, ever believe the used car dealer telling you it has oil, or any other fluid. Check them all before you test drive. Change when you get the new-to-you vehicle home.




Originally Posted By: Win
... a Lycoming. That Lyc would toss off the first quart of heavy Aeroshell in a couple of hours.


Ha, ha, ha! Flew a Lycoming powered aircraft for lots of my training....sump 8qts, it would burn down to 5 -- and stay there until the next oil change.
 
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Originally Posted By: SuzukiGoat
Originally Posted By: artificialist


And I still believe no engine should be burning any oil. Oil burning to me is a sign of bad design.


You are aware that if an engine lubricated by oil, did not burn any oil, said engine would not be being lubricated by said oil.

The oil and compression rings glide over the layer of oil...if the didnt, and scraped it all off...there would be no lubrication.

All engines burn oil. If youre oil level stays exactly the same, I'd bet a cojple of bucks it has higher levels of fuel in it than the same car which uses a cup or two over an OCI.


I've made this same argument here many times to no avail.

People think burning oil = bad thing

So they talk themselves into believing their engine doesn't burn a "drop" of oil.

Apparently BITOGers can change the laws of physics.
 
Yup, luxury cars and SUVs are a magnet for stupid people.

In Los Angeles, most pedestrian fatalities result from hits by luxury cars or SUVs.
 
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