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Crude grade comparison

Mars Blend vs Alaska North Slope

Price, Mars Blend spread, quality and refinery yields side by side. Updated .

USA (Gulf of Mexico)

Mars Blend

$83.41USD/BBL
▲ +0.74 (+0.89%)
Class
Medium/Sour
API
30°
Sulfur
1.87%
VS
Mars Blend – Alaska North Slope spread -6.49 USD/BBL · Mars Blend premium
USA (Alaska)

Alaska North Slope

$89.90USD/BBL
■ 0.00(0.00%)
Class
Medium/Sour
API
31.9°
Sulfur
0.93%

Mars Blend Crude vs Alaska North Slope Crude: on July 06, 2026 Mars Blend settled at $83.41/bbl (+0.89%) and Alaska North Slope at $89.90/bbl (0.00%), putting Alaska North Slope $6.49 above Mars Blend. Mars Blend is medium/sour crude (30° API, 1.87% sulfur); Alaska North Slope is medium/sour crude (31.9° API, 0.93% sulfur).

Price history

Mars Blend vs Alaska North Slope price chart

Daily assessed prices in USD per barrel and the spread between them.

  • Mars Blend Crude
  • Alaska North Slope Crude
30-day Mars Blend avg
$104.91
30 shared days
30-day Alaska North Slope avg
$101.33
30 shared days
Average spread
+3.58
Mars Blend minus Alaska North Slope
Days Mars Blend above
7 / 30
widest $8.95 on 2026-06-08

Mars Blend – Alaska North Slope spread $/bbl · above zero: Mars Blend premium · below zero: Alaska North Slope premium

Free view: last 30 days. Gaps mark days with no assessment. Subscribe for longer history and Excel export.

View as table
DateMars BlendAlaska North SlopeSpread
06 Jul 2026-89.90-
02 Jul 2026-89.90-
01 Jul 2026-89.90-
30 Jun 2026-89.90-
29 Jun 2026-89.90-
26 Jun 2026-89.90-
25 Jun 2026-89.90-
23 Jun 2026-89.90-
22 Jun 2026-89.90-
18 Jun 2026-104.55-
17 Jun 2026-104.55-
16 Jun 2026-104.55-
08 May 2026-115.54-
25 Apr 2026-109.05-
17 Apr 2026-90.38-
10 Apr 2026-109.36-
15 Jun 202696.25104.55-8.3
12 Jun 2026100.20104.55-4.35
11 Jun 2026100.20104.55-4.35
10 Jun 2026104.49104.55-0.060000000000002
09 Jun 2026110.04104.55+5.49
08 Jun 2026113.50104.55+8.95
05 Jun 2026112.21--
04 Jun 2026114.22106.53+7.69
03 Jun 2026115.36106.53+8.83
02 Jun 2026108.00--
01 Jun 2026108.00--
29 May 2026107.54--
27 May 2026109.28--
22 May 2026115.83--
21 May 2026116.85116.17+0.67999999999999
20 May 2026119.41--
19 May 2026118.64116.17+2.47
18 May 2026120.05--
15 May 2026116.98116.17+0.81
14 May 2026121.23--
13 May 2026122.16--
12 May 2026121.51--
11 May 2026118.49--
07 May 2026113.97--
05 May 2026119.96--
04 May 2026119.96--
01 May 2026119.96--
29 Apr 2026118.44--
27 Apr 2026119.06--
01 Mar 202698.08--
Price analysis

Highs and lows by period

PeriodMars BlendAlaska North Slope
HighLowRangeHighLowRange
7 Days---%---%
30 Days---%---%
90 Days---%---%
180 Days122.1662.1549.12%116.1789.922.61%
365 Days122.1662.1549.12%116.1789.922.61%

Range = (high − low) ÷ high.

Daily prices

Recent prices & spread

DateMars BlendChgAlaska North SlopeChgSpread
98.080
119.06+20.98
118.44-0.62
119.96+1.52
119.960
Full daily history for both grades since 2019 is available to subscribers.Subscribe now
Crude quality

Quality & refinery yields

How the two crudes differ in the barrel. Each property uses its own scale.

  • Mars Blend Crude
  • Alaska North Slope Crude

Physical & chemical properties

API gravityhigher = lighter
MB30°
ANS31.9°
Sulfur contenthigher = sourer
MB1.87%
ANS0.93%
Densityhigher = heavier
MB0.87 g/cm³
ANS0.87 g/cm³
Viscosityhigher = thicker
MB8.5 cSt
ANS7.8 cSt
Pour pointhigher = waxier
MB10 °C
ANS15 °C

Typical refinery yields

Gasoline% of barrel
MB20-24%
ANS36-40%
Diesel% of barrel
MB40-45%
ANS32-36%
Jet fuel% of barrel
MB10-12'%
ANS10-12'%
Residual fuel% of barrel
MB18-22%
ANS16-20%

Bars show each yield range; the faint part runs from 0 to the low end. Scale 0–50%.

Full specification comparison

PropertyMars Blend CrudeAlaska North Slope CrudeMars Blend − Alaska North Slope
Classification
ClassificationMedium/SourMedium/Sour
OriginUSA (Gulf of Mexico)USA (Alaska)
Chemical properties
API gravity30° API31.9° API-1.9 °API
Sulfur content1.87%0.93%+0.94%
Density0.87 g/cm³0.87 g/cm³0 g/cm³
Pour point10 °C15 °C-5 °C
Viscosity8.5 cSt7.8 cSt+0.7 cSt
Typical refinery yields
Gasoline20-24%36-40%-16 pts
Diesel40-45%32-36%+9 pts
Jet fuel10-12'%10-12'%0 pts
Residual fuel18-22%16-20%+2 pts
Trading & logistics
Delivery basisLOOP Clovelly, LouisianaValdez, Alaska (US West Coast)
Major exchangesArgus (ASCI); CME Mars FuturesPlatts (ANS West Coast); CME
Export hubLOOP Clovelly, LouisianaValdez, Alaska
Main destinationsUS Gulf Coast refineriesUS West Coast, Asia
Benchmark typeRegional (US Gulf)Regional (US WC)
Market profile
Key characteristicsUS Gulf Coast benchmark, coker feedstockUS West Coast benchmark, moderate sour grade
Refining notesHigh sulfur & resid; processed in coking refineriesModerate distillate yield; significant fuel oil portion
FAQ

Mars Blend vs Alaska North Slope questions

The spread, the quality gap and why each grade is a benchmark.

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July 06, 2026 Mars Blend Crude was $83.41 and Alaska North Slope Crude $89.90 per barrel, so Alaska North Slope traded at a premium of $6.49 over Mars Blend. Over the previous 30 shared price days the spread averaged +3.58 $/bbl, with Alaska North Slope priced above Mars Blend on 7 day(s).

Mars Blend Crude is a medium/sour USA (Gulf of Mexico) crude (30° API, 1.87% sulfur) and Regional (US Gulf) benchmark. Alaska North Slope Crude is a medium/sour USA (Alaska) crude (31.9° API, 0.93% sulfur) and Regional (US WC) benchmark.
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