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Coolant flush. Red or yellow?

I want to replace coolant in my 2006 isx engine. Should I go with extended life red coolant and add sca or that nitrate free yellow coolant?

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I was thinking about that yellow Shell Rotella Ultra ELC which is nitrate and amine free. It's good for 600000 miles and no additives at 300000miles. It's also more expensive then the red Elc coolants. Is it worth to spend extra money on it? Also what about that Evans coolant everyone seems to talk about? Is it wort switching over to? Any problems with it?

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When you do change your antifreeze they recommend it to be mixed with distilled water or de-ionized water not tap water cause of the minerals and solids in tap water

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Yes, and most ELC coolants are already pre-mixed, so you don't need to add water in most situations. If you do, use distilled water and make sure it's either a 50/50 mix or a 70/30 mix depending on your application and your engine manufacturer's requirements.

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Zachary Bell I've already went the Evans route and that didn't work out to good for myself . I cracked 3 heads over 18 month time frame using the Evans and as the Evans got thicker the hotter the engine would run and there was other problems as well with the Evans so I went back to Extended Life Coolant and distilled water and it's working much better than the Evans did.

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I hope others using the Evans product don't have a similar experience to you. I will stop mentioning Evans due to your experience. I still prefer something that is much more available and cheaper than the Evans product anyways- a good, high-quality ELC would be the continued recommendation. Which ELC did you switch to?

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Zachary, most of the ELC made in N.America is made by a company called Kost. There is very little, if any, difference in ELC formulation, just a different label on the jug. Rotella, Delo, Cat, or even the Final Charge brand you find at Loves and other T/S are virtually the same product. I have used/mixed Delo, Rotella, and Final Charge in my engine since it was made 874,000 miles ago. No issues mixing them. It was factory filled with Rotella ELC. Got flushed and filled once by me, and once by Cummins because some retard at the Cummins shop dumped a bunch of SCA's into it and I demanded they flush and fill with new ELC. You have to watch what some mechanics do.

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Mel, I have heard of many bad stories with Evans. Each situation, the owner bumped the thermostat up and ran hotter. I was wondering if any just kept engine temps the same and did Evans, and they have had the same problems you mentioned?

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One thing about the Extended Life Coolant (ELC) is that it is easily good for 500,000 - 600,000 miles with addition of the extender at 300,000 miles. No having to check for anything except freeze point. No SCA's, no test strips, etc. Maybe a blank filter once in a while for good measure. Simple.

Agree with Mel, engine OEM's and the Technology and Maintenance Council recommends ELC coolant. I have yet to not find it at any truckstop, lube shop, or parts outlet, except maybe the mom and pop operation out in the boonies.

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cdowning I never changed the temp of the thermostats. I kept the original temperature and still had problems and some problems with Evans than I didn't mentioned.

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Ok. Thanks for that. I had only heard of problems when doing the high temp thing. I'll stick with ELC.

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I'm thinking of switching to Evans coolant, I may reconsider.

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It's really a toss up and what you choose to do. The extended life is more expensive and sometimes harder to find but I have chosen to stay with the yellow or green. It's more easy to find and the DCA chemical recharge is pretty cheap. I have it in my coolant filter and change it about every 4th oil change. ''italic text''

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I don't care for anything but the red extended life it's no mess no fuss nothing to add plus it's what all the engine mfg recommend besides.

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I too agree with the TMC recommendation on ELC- it's better for the engine and easier on you.

There are 3 different colors- Green, Yellow and Red. Make sure that no matter which color you choose, it meets CAT ELC-1 and it's equivalent ASTM, Cummins and Detroit specs. ELC is easily good for 300,000 to 500,000 miles before it needs to be changed.

ELC is $5-6 more per gallon than the ol' green coolant but it's well worth the added cost, especially given that you won't need to change it as often.

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This is great info to know...

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