i went to a kragens and the sales associate had no clue what kind of coolant i should use because i told him about how thes engines are prone to cavitation. so my ? is what is/are recommended coolants? should i add something to the coolant when i change it?

any help is apreciated. never flushed a radiator.

 

i just bought a pack of 50 coolant test strips for $17.00 bucks at a napa store, i figured it would last me the life of my truck. im going to pick it up tomorrow. so i dont know the condition of my coolant but i think i should change it.

 

Any green coolant is low silicate......... no special requirements other than SCA's.. I used Prestone heavy duty and it may have the SCA's in it already.......

Unfortunately there is a life on test strips........ so 50 would be a waste of $$$$.

 

Yep, and be sure to read the directions and fallow them to the letter and second listed.

1: The temp of the coolant has to be between this and that temp.

2: The test strip has to be submerged just so long.

3: After submerging the test strip, you have to wait no less than X seconds, and no more than X seconds to get your reading.

I did my first test with no DC4L as a control and got a 0 and 0 amount reading as expected.

I added one or two bottles (I can't remember and the test strip is buried somewhere in the garage) of DC4L and got the minimum acceptable reading and it was a little less than 1/2 the maximum.

I then doubled the amount I put in before and got double my first reading which is just below the maximum reading.

I do believe that is the best as the additive is supposed to reduce it's effectiveness over time.

 

I use coolant with an ASTM 4985 rating and add additive. The ASTM 6210 already has additive in it. I won't use ASTM 3306. I'm not sure, but I think the NAPA test strips only work (accurately) for the NAPA additive. I get small packages of DC4 test strips from Diesel Manor online.