Shell Coolant Longlife Plus Ready to Use: specs and approvals

Updated 22 October 2026 · Independent, sourced reference

Summary

Shell Coolant Longlife Plus Ready to Use coolant data, from Shell's own source. Shell Coolant Longlife Plus Ready to Use is a premix (ready to use) Si-OAT coolant listed by Shell (Shell Lubricants). The manufacturer lists 8 OEM or industry spec codes, including VW TL 774-G.

Disclaimer: General information only, not professional advice. Always use the coolant specified in your vehicle owner's manual. Using the wrong coolant can damage an engine.
Independent and not affiliated. Coolant.com is not affiliated with, sponsored by or endorsed by any coolant or vehicle maker or retailer listed here, and we earn nothing from these links. Brand and spec names are used only to identify products. Every field comes from the manufacturer's own page or datasheet, checked 22 October 2026. "Not published" means we could not find it in that source. We record no prices.

Specifications

BrandShell
MakerShell (Shell Lubricants)
ProductShell Coolant Longlife Plus Ready to Use
Part numbers (as published)15-601
Sizes (as published)not published
ChemistrySi-OAT
Base glycolnot published
ColourPink
Premix or concentratePremix (ready to use)
OEM / industry specs listedVW TL 774-G, MB 326.5, MB 326.6, MAN 324 Typ Si-OAT, Cummins CES 14603, BS 6580, JIS K2234, SAE J1034
ASTM standards listedASTM D3306, ASTM D4985, ASTM D6210
Service life claimnot published
Freeze point (as published)-37 °C (ASTM D1177)
Free-of claimsnot published
Datasheetdatasheet
Sourcemanufacturer page
Last checked22 October 2026

Specs and approvals listed by the manufacturer

  • Meets VW TL 774-G per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (Volkswagen Group)
  • Meets MB 326.5 per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (Mercedes-Benz)
  • Meets MB 326.6 per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (Mercedes-Benz)
  • Meets MAN 324 Typ Si-OAT per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (MAN)
  • Meets Cummins CES 14603 per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (Cummins)
  • Meets BS 6580 per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (British Standard)
  • Meets JIS K2234 per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (Japan (JIS))
  • Meets SAE J1034 per Antifreeze is glycol plus inhibitors. Choose it by your vehicle's specification. (SAE)
  • Meets ASTM D3306 per Shell (industry test standard)
  • Meets ASTM D4985 per Shell (industry test standard)
  • Meets ASTM D6210 per Shell (industry test standard)

Manufacturer wording: Shell TDS (Europe, v1.6, Aug 2023), all "(meets requirements)": ASTM D3306, D4985, D6210; BS 6580; Cummins CES 14603; MB-Approval 326.5/326.6; MAN 324 Typ Si-OAT; VW TL-774 G; AFNOR NFR 15-601; JIS K2234; NC 956-16; SAE J1034.

"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.

Compatibility notes

  • If your owner's manual calls for VW TL 774-G, Shell lists that code for this product. Read the exact wording above, and confirm against your manual.
  • Chemistry is listed as Si-OAT. Mixing different chemistries can shorten coolant life. See OAT vs HOAT vs IAT and use the mixing checker before topping up.
  • Colour is listed as Pink. Colour is a dye, not a spec, so two coolants of the same colour can be different chemistries. See coolant colours explained.
  • Sold premixed: pour as supplied. Do not add water unless the label says to.

Note: Shell technical data sheet (Europe) from Shell LiveDocs. Pre-diluted; Shell does not state the dilution ratio on this sheet.

Always check your owner's manual first. Use the coolant spec printed in your owner's manual or service information. A listing here is the manufacturer's own claim (meets, exceeds, approved or recommended, worded as they put it). It is not our approval and not a fitment guarantee for your vehicle. If in doubt, ask your dealer or a qualified mechanic.

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: Shell product page.

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Sources

  1. Shell product page (status on 22 Oct 2026: 200)
  2. Shell datasheet / spec sheet