Can you swap antifreeze types?
QI am changing the antifreeze in my Beta 43 engine and wanted to use the red longlife rather than the two-year blue. Would it be suitable? MICHAEL MARSH, via email
QTONY REPLIES: I can see no reason to to this on some modern engines and cooling systems. The vital thing is to get rid of all the old antifreeze first, otherwise there could be a reaction between the two. When I changed from blue to red I drained the system, refilled with water and ran it up to temperature and drained it three times to ensure virtually no old antifreeze was left. However, Beta recommends using ethylene glycol based antifreeze that conforms to BS6580: 1992 with a ratio of 50/50 water/antifreeze; not using this would invalidate any warranty.