Ive been on Comma oils website and it recomends this coolant and ive used comma coolant in the past with my M3 and had no issues but from what I read and hear Impreza engines are very picky?

http://www.ebay.co.uk/itm/1107739692...84.m1438.l2649

http://www.commaoil.com/products

llast post

 

I use the blue/green comma stuff (Etheylene Glycol) as per the subaru handbook.You can use the newer pink/red types but you need to make sure system is flushed as it reacts with the older types and goes sludgy

i use http://www.commaoil.com/productsguide/view/6/300

Change it every 2 years.

 

i used a OATS one from halfords and it made a right mess. it must have reacted with the old stuff even after a thorough flush. i had to drain and fill again with blue comma which has been fine.

 

What do you mean by a right mess just foaming? could this have been from the flush you used as they tend to foam alot?

 

i flushed with water. it made a mess with lots of slime/paste.

 

just use the blue/green ethylene glycol stuff. Its what subaru recommend.

 

well after reading an australian forum they seem to have a very comprehensive guide on coolants and the coolant subaru brand as there own is made by shell and can be bought off there shelf or they get it from castrrol and the subaru conditioner is rad weld and they also add water wet aswel.

I think ill call subaru in the morning as i dont believe in using such things as rad weld

 

Ive spoke to subaru and my car take 6.1 litres and they sell 1 litre bottles of the subaru blue coolant concentrate at £3.54 i think he said so 3 bottles of this and 3ltires of de-ionised water job done

 

I have been to Subaru today and got 3ltrs of concentrate coolant (blue) £13 not too bad and 2.5ltrs of de-ionised water from tescos £1.50 and the other 500ml can be boiled