|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
06-19-2010, 05:19 PM | #21 |
Senior Member
Join Date: May 2010
Location: oroville ca.
Posts: 1,554
|
Re: Non detergent 40W
Frank you made a lot of good points, now i will answer some of them ,detergent oil does not attack babbit, as you said modern bearings use a coating of babbit as the wear surface against the crank, and they run 200,000 miles or more using detergent oil, that myth started with some model a guys ever since detergent oil was put on the market, and like it or not particals are pumped thru the engine with or with out detergent oil, they can not all settle out over night, if they did the oil would show clean on the dip stick every morning, so they are still suspended and are circulated thru the system, and detergent oil does not flake off large chunks of oil, alto it does wash down the sludge stuck on the sides and bottom of engine , thus removing the sludge slowly, not in big chunks, but arguing that is like aruging religion and politics, you will never change the mind of a zealot or true beliver, best to just let it lie lol
|
06-19-2010, 05:23 PM | #22 |
Senior Member
Join Date: May 2010
Location: "Live Free or Die!"
Posts: 510
|
Re: Non detergent 40W
In answer to the question, 40wt NDT is no longer carried at parts places or so it seems but is still available in 5 gal pails from Valvoline/Drydene, etc. One has to look on the internet. I don't think this is a continuation of the oil arguement. I will continue to use what I have had success with. NDT in old engines of unknown history and modern oil in clean rebuilt engines. I have never in over 40 years had a failure due to the oil. It boils down to the KISS principal. CHANGE THE OiL REGULARLY in accordance with prescribed original interval unless you have a filter. Oil is cheap vs. a rebuild.
__________________
"A wet bird doesn't fly at night." |
Sponsored Links (Register now to hide all advertisements) |
|
06-19-2010, 07:22 PM | #23 |
Member
Join Date: May 2010
Location: Tucson, Arizona
Posts: 41
|
Re: Non detergent 40W
You might want to try your local airport fixed base operator. We use straight mineral oil (Non detergent) for break in on light aircraft engines. After break in we switch to compounded oil (detergent).
We use Aero Shell 100 which is 50 weight But 40 weight could probably be ordered. |
06-19-2010, 07:29 PM | #24 |
Senior Member
Join Date: May 2010
Location: Sugar Land, TX
Posts: 4,395
|
Re: Non detergent 40W
Non-detergent oil proponents. Have you ever seen the amount of sludge build-up when non-detergent oil is used? I found a half inch of sludge in the valve chamber in the 28 RPU I bought 2 years ago. Does that sound good? I cleaned out the pan and valve chamber with carburetor cleaner and put on an oil filter. No more non-detergent oil for me. I personally think detergent oil without a filter and changed every 500 miles would be better than non-detergent oil in the long run. The old VW opposed 4 didn't have an oil filter and had a frequent oil change interval, not that the air cooled engine was long lived.
|
06-19-2010, 08:36 PM | #25 | |
Senior Member
Join Date: May 2010
Location: Salado, TX.
Posts: 733
|
Re: Non detergent 40W
Quote:
Other items to think of for the thoughtful. What we loosely describe as detergent is actually referred to more correctly as detergent/dispersant. I suspect most people have a vision in their mind of something like that toilet bowl cleaner commercial that sends the little "scrubbing bubbles" around the bowl. Doesn't work like that. The dispersant word is more accurate. It's intent is to keep particles formed as byproducts of combustion in suspension as they get into the crankcase, not wait til sludge is formed then "disolve" it. It's second purpose is to neutralize acids that might be formed. (detergents are basic on the PH scale) Believe it or not that's probably less of an issue today than a few decades ago. Today sulphur levels in gasoline are more tightly controlled. Also, when lead was removed from gasoline the chemicals that scavenged out the excess lead freed up during combustion were removed. Those scavenger chemicals also formed acids when mixed with the water vapor resulting from combustion. A significant reason why engine internals and exhaust systems typically last much longer today than years gone bye.
__________________
Luck occurs when preparation and opportunity converge. Last edited by Uncle Bob; 06-20-2010 at 08:39 AM. |
|
06-21-2010, 07:39 PM | #26 |
Senior Member
Join Date: May 2010
Location: Newburgh, NY
Posts: 222
|
Re: Non detergent 40W
Sponsored Links (Register now to hide all advertisements)
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|