Best coolant to run in the isx?

[Volvo8873]

I’m one to run green in everything. Maybe I should not but I dont know, I can tell you that I buy a gallon of full concentrate for 7.00 dollars a gallon at Menards then I buy a gallon of distilled water for .59 cents to use with it.

[smorgan87]

I flushed and refilled mine with prestone green with additive package. When ur pos springs a leak every 15-20k miles i couldnt argue with 7 bucks a concentrated gallon.

[Mrkentee]

I use the red TRP 50/50 from Peterbilt or KW. About $9 a gallon. That’s what they put in if they work on your truck. It has the inhibitor already in it. Just moniter with test strips. Does the job just fine.

[rrod]

(01-08-2018 )Nilao Wrote:  I get the pre-diluated stuff for 2 reasons. 1, it’s easier. 2, tap water has impurities that lead to scale buildup on your liners and radiator tubes. If I do use concentrate I buy gallon jugs of distilled water to keep the system free of hard water deposits.

This is just what works for me.

Just curious. If you had to add about half a gallon of pre-diluted once in a while, would you worry about the glycol levels ?