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T-Cut · 27th September 2019, 15:30

Flushing is unnecessary with today's oils, but if there's any good reason to think it's contaminated (like coolant in the sump), then do so.

Flushing oils aren't designed to drive with, so it's a debatable point whether the half litre remnants of a flush are better/worse (for the fresh charge) than the remnants of the old AECA quality oil. I'd say the the old oil is better (and car manfacturers agree.)

TC

27th September 2019, 15:30	#5
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	Flushing is unnecessary with today's oils, but if there's any good reason to think it's contaminated (like coolant in the sump), then do so. Flushing oils aren't designed to drive with, so it's a debatable point whether the half litre remnants of a flush are better/worse (for the fresh charge) than the remnants of the old AECA quality oil. I'd say the the old oil is better (and car manfacturers agree.) TC Last edited by T-Cut; 27th September 2019 at 15:32..