Summary
Recochem HD Expert Extreme coolant data, from Recochem's own source. HD Expert EXTREME Antifreeze/Coolant is a concentrate and 50/50 premix OAT coolant listed by Recochem. The manufacturer lists 4 OEM or industry spec codes, including CAT EC-1.
What to buy
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Where to buyConfirm the specification in your owner’s manual before buying. Product examples are not a fitment guarantee.
Specifications
| Brand | Recochem |
|---|---|
| Maker | Recochem |
| Product | HD Expert EXTREME Antifreeze/Coolant |
| Part numbers (as published) | 16-524, 16-534, 26-529, 26-539, 48-22880 |
| Sizes (as published) | 3.78 L, 208 L, 55 gal, 1000 L, 264 gal |
| Chemistry | OAT |
| Premix or concentrate | Concentrate and Premix 50/50 |
| OEM / industry specs listed | CAT EC-1, Detroit Diesel 7SE298, Navistar CEMS B-1, MTU MTL 5048 |
| Free-of claims | borate-free, silicate-free, phosphate-free, amine-free |
| Not published by the maker | Base glycol, Colour, ASTM standards, Service life claim, Freeze point, Datasheet. Check the product label or ask the manufacturer. |
| Source | manufacturer page |
| Last checked | 22 October 2026 |
Specs and approvals listed by the manufacturer
- Meets CAT EC-1 per Recochem (Caterpillar)
- Meets Detroit Diesel 7SE298 per Recochem (Detroit Diesel)
- Meets Navistar CEMS B-1 per Recochem (Navistar)
- Meets MTU MTL 5048 per Recochem (MTU)
Manufacturer wording: EXTREME Extended Life Diesel – recommended for use in heavy duty diesel applications where extended service interval & aluminum compatibility is required
"Meets X per manufacturer" is our shorthand for any of the manufacturer's own phrases: meets, meets or exceeds, approved, or recommended for applications requiring. It is the manufacturer's claim, not an approval by Coolant.com or by the vehicle maker. Codes are copied as published. Some sources list codes for compatibility rather than formal approval. The wording above shows which.
What the manufacturer says it is for
Designed for use in heavy duty diesel applications where extended service interval and aluminum compatibility is required and recommended for use in off-road, on-road truck, farm and marine engine applications including, but not limited to, Caterpillar, Cummins, Detroit Diesel/MTU, GM Heavy Truck, Freightliner, PACCAR and Volvo Mack.
Quoted from the manufacturer's page. Coolant.com has not verified fitment for any vehicle, and a listed make or year range is the manufacturer's statement, not ours.
Alternatives that list the same spec
Other coolants whose makers list at least one of the same OEM codes as HD Expert EXTREME Antifreeze/Coolant. More shared codes first. Match the exact code in your manual, and do not mix chemistries when topping up.
| Product | Same code(s) |
|---|---|
| HD EXPERT PREMIUM Antifreeze/Coolant Recochem · not published · Concentrate and Premix 50/50 | CAT EC-1, Detroit Diesel 7SE298, MTU MTL 5048 |
| Zerex G05 Antifreeze Coolant Zerex · HOAT · Concentrate | CAT EC-1, Detroit Diesel 7SE298, MTU MTL 5048 |
| HD EXPERT CLASSIC Antifreeze/Coolant Recochem · not published · Concentrate and Premix 50/50 | Detroit Diesel 7SE298, Navistar CEMS B-1 |
| Prestone Command ESI Precharged Antifreeze + Coolant Prestone · IAT · Premix 50/50 | Detroit Diesel 7SE298, Navistar CEMS B-1 |
| Valvoline MaxLife/Multi-Vehicle Antifreeze Coolant 50/50 Valvoline · not published · Premix 50/50 | Detroit Diesel 7SE298 |
| Zerex Original Green Antifreeze Coolant Zerex · IAT · Concentrate | Detroit Diesel 7SE298 |
Compatibility notes
- If your owner's manual calls for CAT EC-1, Recochem lists that code for this product. Read the exact wording above, and confirm against your manual.
- Chemistry is listed as OAT. Mixing different chemistries can shorten coolant life. See OAT vs HOAT vs IAT and use the mixing checker before topping up.
- Sold premixed: pour as supplied. Do not add water unless the label says to.
Where to buy
We did not find a retailer link on the manufacturer's page that we could check. Try the manufacturer's own site: Recochem product page.
Related tool
Compare this coolant side by side
Open the comparison →Related products with the same listed chemistry
Related products with the same listed chemistry
- Prestone Heavy Duty Antifreeze + Coolant 50/50 Prediluted (Prestone, Premix 50/50)
- Prestone Command Nitrite Free Extended Life Antifreeze + Coolant (Prestone, Concentrate)
- Prestone Cor-Guard Command Nitrite Free Extended Life Antifreeze + Coolant (Prestone, not published)
- Prestone Prime DEX-COOL Compatible Orange Antifreeze + Coolant Check price (Prestone, not published)
- PEAK DEX-COOL 50/50 Prediluted Antifreeze + Coolant (PEAK, Premix 50/50)
- PEAK DEX-COOL Concentrate Antifreeze + Coolant Check price (PEAK, Concentrate)
Vehicle makes linked to this coolant
These make pages explain what each vehicle maker specifies. The reason each one links here is shown next to it. This is not a fitment claim, so check your owner's manual.
- What coolant GM / Chevrolet specifies (the manufacturer names this make in its application text)
- What coolant Volvo specifies (the manufacturer names this make in its application text)
More from Recochem
- DIGGERS OEM Premium Green Coolant
- HD EXPERT CLASSIC Antifreeze/Coolant
- HD Expert EXTEND Antifreeze/Coolant
- HD Expert EXTEND WB Antifreeze/Coolant
- HD EXPERT EXTRA Antifreeze/Coolant
- HD EXPERT PREMIUM Antifreeze/Coolant
See every Recochem product we list, with the chemistries and spec codes the maker names, on the Recochem coolant brand page.
See all Recochem coolants, coolants by brand or coolant by car make.
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