papaindigo wrote:
I'd suggest you start another string entitled something like HOAT antifreeze options for the export market or maybe just antifreeze options for the KJ CRD in the export market. I do not know what the export market manual recommends or what folks are using. In this market HOAT antifreeze is recommended and some have experienced significant problems using products that are not HOAT such as "universal" or OAT antifreeze.
HOAT antifreezes I am familiar with are 5 year or 50-100,000 mile, whichever comes first, products. As I understand it the change interval is based on degradation of the antifreeze's chemistry that provides protection from corrosion in the cooling system not its ability to protect from freezing so in that sense waiting matters only in the corrosion protection area. I have heard but know nothing about products that are "supposed" to resort corrosion protection with an antifreeze change.
As to whether or not that Valvoline product is HOAT I have no clue.
I thought Valvoline was an American brand... Sounds English to me...
I've run a test on the percentage of antifreeze in water I have in the cooling system and it is only at 20%. The mechanic says 33% is the minimum supposedly... I hope it doesnt corrode so much the cylinders lid... I'll have to wait like 2 months to be able to flush all the old liquid and change it again. Cant do it in the country i am at cause it is too expensive...