We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Amber 5-quart bottle of Castrol GTX Ultraclean 5W-30 synthetic blend motor oil

Castrol

Castrol 03096 GTX Ultraclean Synthetic Blend 5W-30 Motor Oil 5 Qt

SKU CH-DNPG-T0RDC

Synthetic-blend 5W-30 motor oil in a 5-quart bottle meets API SN/SJ/SL/SM and ILSAC GF-4/GF-5 standards for gasoline engines

  • Synthetic blend protects gasoline engines
  • Meets API SN, SJ, SL, SM standards
  • Chrysler MS-6395 approved for compatibility
  • Viscosity index 146 for stable flow
  • Flash point 438.8 °F for high-temp safety

What the product is and who it is for

Castrol GTX Ultraclean 5W-30 is a synthetic blend motor oil supplied in a five-quart bottle. It is formulated for gasoline engines and meets API SN, SJ, SL and SM standards. The oil suits drivers who follow manufacturer viscosity recommendations for daily driving.

Build quality and day-to-day implications

The amber fluid delivers a viscosity index of 146 with measured viscosities of 66.4 cSt at 40 degrees C and 10.5 cSt at 100 degrees C. A flash point of 438.8 degrees F and a pour point of minus 38.2 degrees F indicate stable performance across a wide temperature range. The bottle design allows direct pouring during routine top-ups or full changes.

What to check on your existing setup before ordering

Confirm that your gasoline engine specifies SAE 5W-30 viscosity and accepts API SN or earlier ratings. Verify that the required volume matches the five-quart container or plan for multiple bottles. Ensure the oil meets any Chrysler MS-6395 or ILSAC GF-3, GF-4 or GF-5 requirements listed in your owner's manual.

Highlights

  • Synthetic blend protects gasoline engines
  • Meets API SN, SJ, SL, SM standards
  • Chrysler MS-6395 approved for compatibility
  • Viscosity index 146 for stable flow
  • Flash point 438.8 °F for high-temp safety

Specifications

BrandCASTROL

Questions about this item

Which API standards does the GTX Ultraclean 5W-30 meet?

The oil meets API SN, SM, SL and SJ service categories, covering most gasoline engines that require those ratings.

What pour point does this 5 qt bottle of 5W-30 have?

The pour point is -38.2 °F, so the oil stays fluid in very cold starts.

How do you add this synthetic blend to an engine without overfilling?

Check the dipstick first, then pour slowly while rechecking; the 5 qt container matches many sump capacities but engines vary.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.