Summary
Recochem HD Expert Premium coolant data, from Recochem's own source. HD EXPERT PREMIUM Antifreeze/Coolant is a concentrate and 50/50 premix coolant listed by Recochem. The manufacturer lists 6 OEM or industry spec codes, including WSS-M97B51-A1.
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 PREMIUM Antifreeze/Coolant |
| Part numbers (as published) | 16-734, 16-834, 16-835, 26-739, 26-839 |
| Sizes (as published) | 3.78 L, 9.46 L, 208 L, 55 gal, 1000 L, 264 gal |
| Premix or concentrate | Concentrate and Premix 50/50 |
| OEM / industry specs listed | WSS-M97B51-A1, JIS K2234, CAT EC-1, Detroit Diesel 7SE298, MTU MTL 5048, TMC RP-329B |
| Free-of claims | phosphate-free, amine-free |
| Not published by the maker | Chemistry, 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 WSS-M97B51-A1 per Recochem (Ford)
- Meets JIS K2234 per Recochem (Japan (JIS))
- Meets CAT EC-1 per Recochem (Caterpillar)
- Meets Detroit Diesel 7SE298 per Recochem (Detroit Diesel)
- Meets MTU MTL 5048 per Recochem (MTU)
- Meets TMC RP-329B per Recochem (TMC (heavy-duty truck))
Manufacturer wording: PREMIUM Extended Life Diesel – recommended for use where an extended service interval 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
It is designed for use in older model light and heavy duty diesel applications where an extended service interval is required and is recommended for use in on-road truck, off-road, farm, marine and stationary 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 PREMIUM 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) |
|---|---|
| Zerex G05 Antifreeze Coolant Zerex · HOAT · Concentrate | CAT EC-1, Detroit Diesel 7SE298, MTU MTL 5048, TMC RP-329B +1 |
| HD Expert EXTREME Antifreeze/Coolant Recochem · OAT · Concentrate and Premix 50/50 | 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, TMC RP-329B |
| HD EXPERT EXTRA Antifreeze/Coolant Recochem · OAT · Concentrate and Premix 50/50 | TMC RP-329B, WSS-M97B51-A1 |
| Prestone Platinum All Vehicles Antifreeze + Coolant Prestone · not published · Concentrate and Premix 50/50 | WSS-M97B51-A1 |
| OEM Extended Life GOLD Antifreeze/Coolant Recochem · not published · Concentrate and Premix 50/50 | WSS-M97B51-A1 |
Compatibility notes
- If your owner's manual calls for WSS-M97B51-A1, Recochem lists that code for this product. Read the exact wording above, and confirm against your manual.
- 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
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Open the comparison →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 Ford specifies (the manufacturer lists a spec code from this vehicle maker)
- 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 EXTREME 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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- Facts come from manufacturer pages, datasheets, owner's manuals and standards bodies, linked under Sources.
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- Anything we could not find is marked "not published" rather than guessed. Spotted an error? Tell us.