Antifreeze

[Crow]

Lads ,I'm pulling remains of my hair out trying to find out what type of antifreeze to put in my on going project boat,rightly or otherwise I've made and fitted 7 sq ft worth of stainless steel keel coolers,

The engine has a aluminium manifold water filler tank,and engine is cast iron,there seems to be

Loads of different sorts nowadays .thanks ,nick

[peterboat]

Either 5 or ten year antifreeze its the pink one and sometimes violet for the ten year

[cuthound]

Either 5 or ten year antifreeze its the pink one and sometimes violet for the ten year

Seconded. I used Ford Super Plus Premium, a 10 year antifreeze. It is a potentially messy and time consuming job to change antifreeze, and disposal can only be done at certain public waste disposal facilities.

[PeterDHS]

Agreed.

My simple understanding is that the corrosion inhibitors decay at a faster rate than the antifreeze content. so cheap blue antifreeze might well protect from freezing for upwards of three years but your engine will be rotting from the insides. The inhibitors in pink antifreeze will last five years between changes, when you would probably want to flush the system anyway.

As said, changing the AF, flushing and disposing is a pain. Fewer times the better,