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stevestrat · 16th April 2022, 17:09

There are actually three opinions: OAT at recommended 50% concentration, OAT at lower 25-30% concentration, blue.

If you do change to blue you need to ensure every drop of red is out.

16th April 2022, 17:09	#2
stevestrat This is my second home ZT260 #243 (resting) Join Date: May 2010 Location: Prestonpans Posts: 22,566 Thanks: 650 Thanked 4,624 Times in 3,358 Posts	There are actually three opinions: OAT at recommended 50% concentration, OAT at lower 25-30% concentration, blue. If you do change to blue you need to ensure every drop of red is out. __________________ Steve T4 Location Map