Just wanted to contribute because I spent two days reading through forums on the best coolant for my 95 3.0 ATM.
Bought my truck a few months ago with no service records. Radiator was full of brown/green coolant and sludge/rust. Was thinking about replacing it with a new aluminum radiator but decided to take it to a radiator repair shop and get it rodded and cleaned. $125 bucks and I'm keeping my brass
Flushed out the cooling system, including the heater coil and installed the radiator back inside. Snug as a bug. Then I couldn't decide what to fill er up with. Hence, 2 days on the internet and joining this great debate.
It boils down to this, (what a pun) My 95 did not have factory Red as that didn't become available until the 98 or 99 model 4runners. If I plan on changing out the fluid ever couple of years anyways, that Red just didn't seem like a must have.
I decided to go with the Zerex Asian Formula. Silicate and Borate free pre-mixed blend. 5 year guarantee or 150k miles and a lot of people I've read have used it and feel good about the product. So, I went with it and bought two gallons at 15 bucks a pop.
I think it comes down to preference. Many will only use toyota brands and thats awesome! I do my best to get toyota parts myself but I think Zerex will hold up just as well.
To help answer the original question... Red or Zerex Asian for my money. If that ever changes, I'll let you know
