This may have been covered in some distant past threads, but if so, I
don't recall the outcome of what most likely was conjecture rather than
petroleum engineering observation, in any event.

Thus...

My Perkins 4-154 has a sump drain which connects to a hose with a
seacock inline. To do oil changes, one opens the seacock, connects a
pump to the higher-than-the-engine end of the hose and evacuates the
old oil, changes the filter and puts in new oil.

My fuel polishing setup is now complete, and is such overkill in volume
(3.5 gpm, run for 24 hours, would recycle my entire tank more than 50
times, at a cost of about 19AH) that I'm comfortable with its ability
to clean my tank, regardless of what may come up the common supply tube
(engine feeds from the same line). I've also now got a dual Racor
setup to be able to change filters with the engine running - both the
polishing system and the Racors have vacuum gauges to monitor
appropriate change intervals - but that's not the point of my post.
That big pump, recycling to that big tank, is...


Is there any scientific reason which would encourage, or discourage,
utilizing a pump to do engine oil change waste oil evacuations, putting
the waste oil into the diesel tank (circa 100 gallons; i.e. ~1-2%
typical), for mixing and burning with the rest, thus neatly not only
solving the disposal problem but also reclaiming the dead dinos'
energy?

If there are engineering reasons against, due to the nature of the
waste oil, are there any levels of change (more frequent) which would
mitigate those, assuming that filter changes occurred at the same
intervals?

I know it's useless to ask :{)) but it would be more informative to
have sound engineering rather than conjecture in reply to this topic...

L8R

Skip, back to shoring up ancient flooring supports

Morgan 461 #2
SV Flying Pig KI4MPC
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