# Insight Engine Coolant

**URL:** <https://community.cartalk.com/t/insight-engine-coolant/1176>\
**Category:** Maintenance/Repairs\
**Tags:** insight, coolant, engines, honda\
**Created:** [July 1, 2007, 6:44pm UTC](https://community.cartalk.com/t/insight-engine-coolant/1176 "2007-07-01T18:44:21Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![agetzler](https://avatars.discourse-cdn.com/v4/letter/a/9de0a6/32.png) [@agetzler](https://community.cartalk.com/u/agetzler)\
**Post date:** [July 1, 2007, 6:44pm UTC](https://community.cartalk.com/t/insight-engine-coolant/1176/1 "2007-07-01T18:44:21Z")

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I have a 2000 Honda Insight, and was recently embarking on a road trip. Noticing that my engine coolant was low I added what I had (50/50 water & Preston All Weather Protection Anti-freeze). I don’t seem to be loosing any more coolant, but my owners manual repeatedly insists that I should only use Genuine Honda Antifreeze/Coolant, and that if I use anything else it “can result in corrosion, causing the cooling system to malfunction or fail. Have the cooling system flushed and refilled with Honda antifreeze/coolant as soon as possible.” Is this really true/ necessary?  
  
  
  
 Thanks!  
  
 Avilah

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**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\
**Post date:** [July 4, 2007, 2:29am UTC](https://community.cartalk.com/t/insight-engine-coolant/1176/2 "2007-07-04T02:29:59Z")

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The Honda coolant is the same as your basic ethylene glycol except that is is Borate free. A tiny amount of borates from an older antifreeze won’t hurt, most new coolants are borate free.