Penrite 15w-50 in a TD ?

[Touses]

Interesting to see that some are noticing usage .

What is the actual science behind this ? Do some oils get past some nooks and crannies due to its grade , while other oils are ok ?



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In my case I'm putting usage down to bore glazing.
The engine is fully balanced, right down to clutch on flywheel.
It runs so effin' sweet it hardly has to work at all.
I need to get a full load, backpack/ camper trailer to make it dig in and pull.
Cuts the glaze in no time and then uses eff all oil.
Good excuse to go camping, hasn't been enough of that lately, too bloody busy elsewhere.