Sorry, another oil thread

[lout]

there is a lot more to engine wear than just soot, moisture is a main culprit, there are 3 types of moisture in an engine and none are good for it.
the best way to eliminate moisture is regular oil changes.

[Cadence]

Originally Posted by Simi 60

$10 in toy motors
Not so in ones that take 40 litres to fill.

Plus for our engine we were warned away from it, to low a viscosity and a great way to start it leaking we were told.

Even old 671s are 26 qts. deep pan. Not $10.

[a64pilot]

Originally Posted by lout

there is a lot more to engine wear than just soot, moisture is a main culprit, there are 3 types of moisture in an engine and none are good for it.
the best way to eliminate moisture is regular oil changes.

I know there is moisture, and it forms acid among other things, like sludge. But have never heard of three types?

[lout]

Originally Posted by a64pilot

I know there is moisture, and it forms acid among other things, like sludge. But have never heard of three types?

• Disolved moisture : From ambient air humidity.

• Emulsified Moisture : Disolved Moisture that has had the crap beaten out of it.

• Free Moisture: basically just water sitting in the bottom of your sump.

[sailingharry]

My old (O-L-D!) 1979 Volvo MD11C (with a design dating back another decade) specs 100 hours for oil changes. Oil has come a LONG way since then, and diesel oil itself has come a long way since then. I've run oil samples a few times at the 100 hour oil change, and they come back with LOTS of life left. TBN, the acid fighter, is less than 20% consumed, etc. Bottom line, I've shifted to changing it every fall regardless of hours run (although I don't think I've ever hit a 150 hour season, so I'm not much over the original spec).


With regard to oil and engine life.... I routinely run my cars 20+ years and 250K miles, and never had an an engine fail (well, from oil -- do timing belts or blown head gaskets or dropped valves/seats count?). My father's 1979 Perkins 4-236 is just over 10,000 hours, and he can't think of a reason to do anything with it besides another lap on the ICW. I'm not sure if I even KNOW anyone with an engine that failed, especially one that can be blamed on oil. I've never understood the "oil is cheap insurance" argument -- it sounds good, but it's hard to find examples of failures!


Harry