i use peak 50/50 Red stuff formulated for toyota lexus and scion
Not an LS specifically but I had good luck with the PEAK 50/50 pre-diluted mix from Autozone.
I used peak when I changed my rad, no issues so far
But for the love of god use the blue stuff. Preferably the correct brand but I couldn't find any in my hick-ass town so I used Prestone and I haven't noticed any ill effects
I use Peak for Asian vehicles, green in color, for my Mazda's. Get it at most auto parts stores in 50/50 mix so you never worry about cold temps in winter.
After that, you can run generally whatever universal coolant you'd like. I do a universal Prestone and have no cooling problems. I live at the beach and drive my stage 2 Jetta 2.5L pretty hard.
I bought prestone Max concentrate for all vehicles. The yellow stuff. I also looked at the technical data sheets on the product. Happy to report this thing runs cooler than it ever has and I live in Phoenix arizona.
Peak final charge is compatible and meets all necessary specs. Bonus is it's available almost everywhere in the US and Canada
you can use peak, most likely it will be fine, it may just cause your radiator and heater core to clog. i used to run it with absolutely no problems. i now just prefer g11/g12
Do not use Prestone 50/50. It is technically compatible, but it is a different formulation. Using Prestone 50/50 will shorten your service intervals to 36,000 miles. Beyond 36,000 miles you will cause damage to occur to the seals.
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