1991 Honda Civic Si (1.6L) Coolant/Antifreeze recommendation
- Thread starter Gito
- Start date
Zerex Asian Blue or Pentofrost A3
1991 is old enough to be IAT green originally, at least my '89 & '90 Civics were. The new Peak 10X is showing promise in Asian/Honda applications, it has been working quite well in my brother's beater '01 Accord 2.3. Cheap, available lots of places, often on sale with a rebate, that's what I would use (& eventually my aging Toyota fleet is going that way too).
The blue coolants seem to say Honda 90 and up, so the blue Type II is probably backwards-compatible
Whatever is cheapest at WalMart.
As an apparent dissenter I vote for Honda Type II. I’ve used it in my old Honda for over two decades and it’s kept the system pretty much pristine inside. Perhaps another coolant would do just as well but this is my experience. $18 a gallon at my dealer for the pre-mix which doesn’t seem excessive to me.
JHZR2
Staff member
That will get some universal junk with 2-EHA which I’d be concerned to run in something this old. Engine may be perfect but seals do age.
Full flush and then use whatever you want as long as it’s is not a dexcool clone containing 2eha inhibitors.
What about 2012 Honda Fit or 2002 Honda Accord. I think the coolant is blue. I always used Honda coolant but I figure if there is an equivalent, I may as well investigate if it is a lot less. By the way, I approach this with the assumption that Honda makes engines and tramissions while many other components are made by third-party vendors. For example, we don't all use Honda motor oil. For complex system such as AT, I do use Honda ATF religiously as it is about the same cost as Mobil 1 ATF.
Also, would you order from HondaPartNow. They have it for $16 before taxes and fees. Amazon lists it for $29 but shipping maybe included for Prime members.
https://www.hondapartsnow.com/genuine/honda~coolant~OL999-9001.html
Thank you guys.
Also, would you order from HondaPartNow. They have it for $16 before taxes and fees. Amazon lists it for $29 but shipping maybe included for Prime members.
https://www.hondapartsnow.com/genuine/honda~coolant~OL999-9001.html
Thank you guys.
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That's the way I see it. It probably ran a silicate IAT green back then.
I like G-05 for these applications, it's a silicate containing hybrid HOAT coolant with no 2-EHA. Flush and G-05.
OP, I know you have already decided, just adding to the thread for future readers.
Patman
Staff member
I know that this is an old thread but I just wanted to add a comment here instead of starting a completely new thread.
I think that the coolant that Honda uses is very good and there really is no reason to use anything else.
I have read that on a lot of Honda vehicles (like my 2016 Civic) that they recommend doing the first coolant change at the ten year mark and then every 5 years after that. I’m currently at 9 years and 165,000 miles on the original coolant. I have an appointment at my local Honda dealer to have it changed next week though. They only charge $137 Canadian ($95 US) to do it so I’m pretty certain it’s going to be just a drain and fill of what’s in the rad but I’m ok with that.
I think that the coolant that Honda uses is very good and there really is no reason to use anything else.
I have read that on a lot of Honda vehicles (like my 2016 Civic) that they recommend doing the first coolant change at the ten year mark and then every 5 years after that. I’m currently at 9 years and 165,000 miles on the original coolant. I have an appointment at my local Honda dealer to have it changed next week though. They only charge $137 Canadian ($95 US) to do it so I’m pretty certain it’s going to be just a drain and fill of what’s in the rad but I’m ok with that.
