Rated 4.3 out of 5 by 10
Rated 5 out of 5 by batchy nice
Works great! Just using water and RP additive and engine stays cool.
October 21, 2016
Rated 1 out of 5 by 72chevelle No temperature reduction
I put royal purple ice in my radiator and saw no difference in temperature reduction, I very disappointed.
September 19, 2016
Rated 5 out of 5 by IndyGuru Car seems to run cooler!
To be honest, it's too early to tell since I barely used this product. I used this product with 50/50 coolant mix as recommended from factory. I did notice my Evo seems to run cooler and it was taking longer for the radiator fan to kick in.
September 9, 2016
Rated 3 out of 5 by GRFJr ok
didn't see temp go much if any lower
September 2, 2016
Rated 5 out of 5 by Verified Reviewer ecellent
this product does what it says it does! it keep my 87 mustang running nice and cool!!!!!!
I love it and would recommend it to anyone!
June 15, 2015
Rated 5 out of 5 by KINGARTHUR worked
Royal Purple Purple Ice Super Coolant Additive
brought my operating temp down 10 degrees
June 6, 2015
Rated 4 out of 5 by tommy2sweet would buy again
I can't say what exactly Royal Ice has actually done but, it seems to have lowered the radiator temp. just enough to keep it from running too hot while in traffic. This has been a chronic problem with my '96 mark 8. It still runs hotter than I would like but, it has taken that nervous gut feeling away when I get caught in traffic. That alone, makes it a winner with me!
June 5, 2015
Rated 5 out of 5 by localguy76 amazing
great product would recommend it to everyone!
May 21, 2015