Mack Pinnacle CXU · fluids
Fluids & Fill AmountsHow much oil, coolant, DEF and gear oil this truck takes, and what specification to buy.
Set the year first
Then read the How much column as a refill quantity, not a dry fill. Fill to the dipstick or sight glass and treat the number as a starting point — a drain never gets everything out.
Fill amounts for Mack Pinnacle CXU
| Fluid | How much | What to buy | Years | Source |
|---|---|---|---|---|
| Engine oil - MP8 (pan + filter)Change it: 25,000 mi highway; 15,000 mi severe | 44 qt (42 L) | Mack EOS-4.5 / EO-O Premium Plus, 15W-40 CK-4 | 2007–2020 | Verified |
| Engine coolantChange it: Test at PM | Not verified - consult OEM service manual | Mack VCS2 coolant (from Aug 2023); VCS red earlier | 2007–2020 | Unconfirmed |
| DEF tankChange it: Fill at every fuel stop | 6-13 gal depending on option | ISO 22241 DEF | 2010–2020 | Verified |
| Fuel tankChange it: - | 75-200 gal depending on option | ULSD, 15 ppm max | 2006–2020 | Verified |
Sources: Mack Body Builder Instructions; Mack Body Builder Instructions USA189962715; Mack Pinnacle specification
Two ways to wreck an engine in five minutes
Overfilling an oil pan aerates the oil and can damage bearings. Running a cooling system low can crack a liner or a head before the gauge even moves. Fill slowly, then check the dipstick or sight glass twice.