“The oil in my diesel Polo looks terrible after a years running, it’s black as night and it’s protective properties are severely reduced compared to the fresh stuff replacing it. It’s a false economy to scrimp on it.
I know its an aside, perish the thought a BR thread should ever stay completely on topic :-)
We bought a 3 litre Diesel Hilux new in 2007, it had twice yearly oil changes from new and up till we sold it 3.5 years later the engine oil would stay clean for a good 1000 miles, obviously the Toyota engine drains well within where some Diesels are filthy within moments of restarting, the family BMW Diesel was like this, within minutes you'd never know the oil had been changed.
We bought the present Landcruiser used some 3 years ago, same engine now done around 105k miles, it had seen normal regular maintenance up till then but i noticed the oil would go dark within probably 200 miles of renewal.
I'd been hankering about returning to proper Diesel engine oil and bought some 10w40 semi synth oil meant for Diesels in bulk (not the newer sort for DPF,s not needed), after some 3 oil changes, every 6 months, its clear the engine is getting cleaner as the oil is now staying clear for about 800 miles and improving, been an interesting little experiment and i shall continue to do this, a new bulk bought Wix filter each time...note to self i keep meaning to cut open one of the used filters and see what's being captured if anything.
Just thought i'd mention this out of interest, not saying anyone else should follow my example, for those interested i allow it to drain properly for at least several hours and often overnight, this is so i can shine a light up to the oil pick up strainer just above the drain plug and check it's completely clean.
I keep toying with the idea of a catch can and oil spinner too, but haven't bought either yet.
Edited by gordonbennet on 02/09/2019 at 18:34
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