Delo elc
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,346
Likes: 5,941
From: Lake Hartwell, GA
You will be OK using the regular coolant, no need to flush it out since you just replaced it. I swapped to ELC only because I needed to replace the water pump and flush the system anyway. Seemed like a good idea at the time is all.
Senior User
Joined: Oct 2006
Posts: 223
Likes: 0
From: south cali
What are the odds of you going 750K miles on the same coolant. I think not very good. My truck is nearing 400k, i bought it with 84K and in that time i have had to swap coolant about 3 times. 1. Waterpump replacement. 2. Injector replacement. 3. Engine rebuild.
This time around i went with regular green stuff and will be checking levels with test strips every so often.
This time around i went with regular green stuff and will be checking levels with test strips every so often.
Lead Driver
Joined: Dec 2006
Posts: 7,092
Likes: 145
From: San Diego, CA
The hoses and pump aren't going to last 750K that's for sure. Just like UcaN I'm on my 3rd fill since I bought my truck:
1. Bought the truck. Replaced hoses and flushed the system.
2. Water pump started weeping at 180K. Replaced pump and hoses, flushed the system.
3. Radiator sprung a leak at 290K (plastic nipple to degas bottle). Replaced radiator, hoses, and flushed the system. I also took the opportunity to re-seal my oil cooler since it had been leaking for some time but waited until it got bad enough to do it or I had another reason to drain the coolant.
I got 140K on my longest interval so far (a whopping 18.7% of service life!). I'm still on my original injectors at 299K so I don't know if I'll even make it to 400K before another drain to put in new ones.
While it's overkill for us (I think the 750K is more for the OTR trucks), I never have to worry about any coolant fluid service intervals.
1. Bought the truck. Replaced hoses and flushed the system.
2. Water pump started weeping at 180K. Replaced pump and hoses, flushed the system.
3. Radiator sprung a leak at 290K (plastic nipple to degas bottle). Replaced radiator, hoses, and flushed the system. I also took the opportunity to re-seal my oil cooler since it had been leaking for some time but waited until it got bad enough to do it or I had another reason to drain the coolant.
I got 140K on my longest interval so far (a whopping 18.7% of service life!). I'm still on my original injectors at 299K so I don't know if I'll even make it to 400K before another drain to put in new ones.
While it's overkill for us (I think the 750K is more for the OTR trucks), I never have to worry about any coolant fluid service intervals.
Posting Guru
Joined: Oct 2012
Posts: 1,910
Likes: 2
From: Hat Creek Ca
"While it's overkill for us (I think the 750K is more for the OTR trucks), I never have to worry about any coolant fluid service intervals."
__________________________________________________ _____________________
This is the main objective in my way of thinking. Very few of us will ever see that mileage on our truck, most likely not even half tha much. But for a few extra bucks it is well worth the peace of mind to not have to bother with the coolant chemistry on a regular basis.
__________________________________________________ _____________________
This is the main objective in my way of thinking. Very few of us will ever see that mileage on our truck, most likely not even half tha much. But for a few extra bucks it is well worth the peace of mind to not have to bother with the coolant chemistry on a regular basis.
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
I flushed and filled my Ex with Delo ELC back in '06 I think it was, and just did it again last year because it had been over 8 years.
It actually does.
Removing the need for the SCA package by switching to an OAT Extended Life Coolant provides better transfer of heat, along with better cavitation protection, when compared to the Ford gold coolant (Zerex G-01 equivalent) or the traditional "green" coolant needing SCA's.
Chances are you will have some kind of leak and end up changing out the coolant anyways long before the "extended" benefits kick in.
When I did my Ex back in '06, I had no coolant system issues or leaks.
When I did my Ex last year, the next day (or close to it) my water pump took a crap, LOL!
I just filtered the coolant and reused it obviously, but I thought it was funny i'm batting .500 with the Ex in relation to that statement!
My old '02 is still going strong after switching to Delo OAT ELC.
Gooch's Coolant Flush Procedure and In-Depth Coolant Information - FTE
Stewart
Elder User
Joined: Sep 2003
Posts: 582
Likes: 0
From: New Baden IL
Delo ELC is a highly recommended coolant if your search this Forum. I swapped out just two months ago...I was ready to spend the extra money approx. $25 per gallon BUT...my local NAPA dealer turned me onto a local oil dealer in my area. He sold me 6 gallons of Delo ELC for $10.50 a gallon...TEN DOLLARS AND FIFTY CENTS A GALLON! Look around, if you have oil dealers who sell heating oil etc perhaps they carry this too!
Posting Guru
Joined: Oct 2012
Posts: 1,910
Likes: 2
From: Hat Creek Ca
Delo ELC for $10.50 a gallon...TEN DOLLARS AND FIFTY CENTS A GALLON! Look around, if you have oil dealers who sell heating oil etc perhaps they carry this too!
__________________________________________________ ____________________
Just be sure it is the 100% concentrate. Otherwise you will need to do the math based on assumptions of how muc residual water is left in he block after flushing.
__________________________________________________ ____________________
Just be sure it is the 100% concentrate. Otherwise you will need to do the math based on assumptions of how muc residual water is left in he block after flushing.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Mountain Pass
Joined: Nov 2016
Posts: 153
Likes: 2
From: Front Range
Googling "heating oil" brought up a local dealer who sells Delo ELC. I maybe should have shopped around more, still I don't regret paying the price. Even with an 8 year lifespan I'll recoup in 6 years while using what I think is a superior product. If the cavitation control is better than the green stuff and my water pump lasts a couple extra months, I'm money ahead.
Lead Driver
Joined: Dec 2006
Posts: 7,092
Likes: 145
From: San Diego, CA
I'd say the engineers did us a solid but I think the cooling capacity was more luck on our part than planning on theirs.
Thread
Thread Starter
Forum
Replies
Last Post