8 Fairfax St SE
NAPA Auto Parts Genuine Parts Company
8 Fairfax St SE
Leesburg,  VA  20175
(703) 777-2055
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Sat:8:00 AM-5:00 PM
Sun:9:00 AM-5:00 PM
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Castrol GTX Ultraclean Motor Oil 5W20 Synthetic Blend 5 qt (US)

Castrol GTX Ultraclean Motor Oil 5W20 Synthetic Blend 5 qt (US)

Part #: CAS 091
Line: Castrol

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Features & Benefits

Warranty: Standard : Products Are Free Of Defects And Meets Standard Specifications


Environmental factors such as poor fuel quality, hot weather and stop-start driving conditions can lead to sludge, varnish and carbon build-up in your engine: three factors that reduce engine life, power and fuel economy. Castrol Ultraclean is a synthetic blend engine oil available in 0W-20, 5W-20 and 5W-30 grades. Its double-action formula has been proven to clean away the sludge that can block engine oilways (when tested in engines with a high level of sludge) and helps prevent new sludge formation thanks to its synthetic technology. In fact, it provides up to 1.4X better sludge protection than is demanded by the latest industry standard. If keeping your engine clean is important to you, it's good to know that no other oil keeps engines cleaner.

  • 1.4X superior sludge protection compared to tough industry standards (as measured in the Sequence VH Sludge test vs. API SP test limits)
  • Advanced protection against viscosity and thermal breakdown
  • Meets or exceeds API SP/SN PLUS/SN
  • Meets or exceeds ILSAC GF-6
  • Meets Ford WSS-M2C946-B1
  • Meets Ford WSS-M2C961-A1
  • Check out the full line from Castrol Motor Engine Oil to find the right product for your vehicle.


Container Size 5 qt (US)
Synthetic No
High Mileage Formula No
Sub Brand GTX Ultraclean
VMRS Code 053-999-016
Weight Rating 5W20
Brand Castrol
Motor Oil Style and Type Synthetic Blend
Approved Motor Oil Specification ILSAC GF-5,WSS-M2C945-B1
Contains VOCs Yes
Manufacturer Castrol
SDS Required Yes

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