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Motul 5W40 Oil Change Kit EJ WRX/STI vs Mobil 1 Dexos R 0W-40 Oil Change Kit

These kits serve different engines, so the real question is fit. The Motul kit is built for turbo Subaru EJ cars: it pairs 5W40 X-cess gen2 with a genuine Subaru filter and crush washer, and its heavier hot viscosity suits built motors and high boost. The Mobil 1 kit is a GM kit: 0W-40 Supercar oil with dexos R approval and an AC Delco PF64 filter, sized for 6.2L, 3.6L and L4 GM engines. Buy the one that matches your car; neither is a universal upgrade over the other.

  • Choose the Motul kit if you drive a turbo Subaru EJ car (WRX, STI, Forester XT, Legacy GT, Outback XT) and want a complete OEM-filter kit with a thicker 5W40 for high boost or a built motor.
  • Choose the Mobil 1 kit if you drive a GM 6.2L, 3.6L or L4 engine that calls for dexos R 0W-40 and an AC Delco PF64 filter.

Prices

  • Motul 5W40 Oil Change Kit EJ WRX/STI: $12.99 at CircleTrackSupply.com (last seen Nov 8)
  • Mobil 1 Dexos R 0W-40 Oil Change Kit: $85.85 at Walmart (checked today)
  • Difference: the Motul 5W40 Oil Change Kit EJ WRX/STI is $72.86 cheaper than the Mobil 1 Dexos R 0W-40 Oil Change Kit at the latest prices (Nov 8 and Nov 10)
Motul
Motul 5W40 Oil Change Kit EJ WRX/STI

Motul 5W40 Oil Change Kit EJ WRX/STI

5(1 rating)
$12.99at CircleTrackSupply.comChecked Nov 8
See all prices and details
Visit CircleTrackSupply.com
Pros
  • Complete kit with OEM filter and crush washer
  • 5W40 holds viscosity better under high boost and heat
  • Covers a wide range of turbo EJ Subaru models
Cons
  • Fits only turbo Subaru EJ cars
  • 5W is thicker than 0W on cold starts
  • Five liters may fall short of some fill capacities
Mobil 1
Mobil 1 Dexos R 0W40/AC Delco PF64 Filter Oil Change Kit, 6 qt.

Mobil 1 Dexos R 0W-40 Oil Change Kit

Mobil 1 Dexos R 0W40/AC Delco PF64 Filter Oil Change Kit, 6 qt.

4.8(4 ratings)
$85.85at WalmartChecked 5 h ago
See all prices and details
Visit Walmart
Pros
  • dexos R approved for GM high-performance engines
  • 0W-40 flows faster on cold starts
  • Six quarts covers larger fills
Cons
  • Fits only GM engines that take the PF64 filter
  • No drain plug washer in the kit
  • Not intended for Subaru EJ engines

What separates them

Motul 5W40 Oil Change Kit EJ WRX/STIMobil 1 Dexos R 0W-40 Oil Change Kit
Engine fitmentTurbo Subaru EJ engines: 2002-2014 WRX, 2004-2021 STI, Forester XT, Legacy GT/Outback XTGM 6.2L, 3.6L and L4 engines using the PF64 filter
Oil viscosity5W40, thicker at high temperature0W-40, thinner when cold, same hot grade range
Oil specMotul X-cess gen2, aimed at built motors and very high boostMobil 1 Supercar, dexos R approved and usable in place of dexos 2
Filter includedGenuine OEM Subaru filter plus drain plug crush washerAC Delco PF64 Professional filter, no washer listed
Oil volumeFive litersSix quarts (about 5.7 liters)
Cold-start flow5W, slower to flow in cold weather0W, flows faster on cold starts
Track and street useSuits high boost and built motorsMarketed for street and track in high-performance cars

Price history

$99.98$11.61
Nov 8Nov 11
  • Motul 5W40 Oil Change Kit EJ WRX/STI: lowest $11.61 on Nov 8 at www.425motorsports.com; $99.98 on Nov 11.
  • Mobil 1 Dexos R 0W-40 Oil Change Kit: lowest $85.85 on Nov 9 at Walmart; $85.85 on Nov 10.

Prices at every store

Motul 5W40 Oil Change Kit EJ WRX/STI

  • www.425motorsports.comNew

    In stock

    $11.61Free shippingChecked Nov 8
    Visit www.425motorsports.com
  • CircleTrackSupply.comNew

    In stock

    $12.99Checked Nov 8
    Visit CircleTrackSupply.com
  • ModBargainsNew

    In stock

    $14.00+ $12.00 shippingChecked Nov 8
    Visit ModBargains
  • Milky MotorsportsNew

    In stock

    $12.49+ $13.99 shippingChecked Nov 8
    Visit Milky Motorsports

Also available at

  • FastWRX.comCheck price at FastWRX.com
  • Import Image RacingCheck price at Import Image Racing
All 7 stores and price history →

Mobil 1 Dexos R 0W-40 Oil Change Kit

  • WalmartNew

    In stockSold by Speedway Motors, INC

    $85.85+ $13.99 shippingChecked 5 h ago
    Visit Walmart

Also available at

  • WalmartCheck price at Walmart
Prices and history →

Specs compared

SpecMotul 5W40 Oil Change Kit EJ WRX/STIMobil 1 Dexos R 0W-40 Oil Change Kit
size—6 qt
Oil type—Synthetic
Oil weight—0W40
Liquid measurement—6 quarts

What reviewers say

Motul 5W40 Oil Change Kit EJ WRX/STI

Owners of turbo EJ Subarus rate the kit for bundling the right OEM filter and washer with a quality full-synthetic oil. Most praise comes from built and high-boost cars; stock-engine owners are more likely to question whether 5W40 is the right grade.

What people mention
  • Oil gradeMixedSome owners like the extra high-temperature viscosity for built motors, while stock-engine owners question using 5W40 over 5W30.
  • Filter fitPraisedThe genuine Subaru filter and crush washer are reported to fit correctly on turbo EJ cars.
  • Oil qualityPraisedMotul X-cess gen2 full synthetic is well regarded for holding up under high boost and heat.
  • Kit contentsMixedBuyers like having oil, filter and washer together, but note the kit has no funnel, gloves or drain pan.

Mobil 1 Dexos R 0W-40 Oil Change Kit

Owners of GM V8s and V6s rate this oil highly for track days and daily driving, and the dexos R approval reassures warranty-conscious buyers. Complaints are few and mostly about the filter fitment being limited to GM engines.

What people mention
  • Track usePraisedOwners say it holds up to repeated track sessions without thinning or pressure loss.
  • Engine noisePraisedDrivers report quieter valvetrain and smoother idle after switching to it.
  • Dexos R specPraisedBuyers like that it meets the current GM high-performance spec and covers the warranty requirement.
  • Filter fitmentMixedThe PF64 filter fits the listed GM engines well, but it does not cross over to other makes.

Questions and answers

Which kit fits my car?
Match the engine, not the brand. The Motul kit fits turbo Subaru EJ cars. The Mobil 1 kit fits GM 6.2L, 3.6L and L4 engines that use the AC Delco PF64 filter. Using the wrong filter or oil grade can void protection.
Is 5W40 better than 0W-40?
Neither is better in general. Both are 40-grade when hot. 0W-40 flows faster on cold starts; 5W40 is the choice for built Subaru motors and very high boost.
Can I use the Mobil 1 kit in my WRX?
No. The PF64 filter and dexos R oil are specified for GM engines, not Subaru EJ motors. Use the Motul kit or another Subaru-correct kit.
Which kit lasts longer between changes?
Interval depends on your owner's manual and driving, not the kit. Both are full synthetics. Track use and high boost shorten intervals on either.
Is the Mobil 1 kit worth stepping up to?
Only if you own a GM engine that requires dexos R. For a Subaru, it is the wrong kit regardless of the oil's quality.
Does the Motul kit include everything for a change?
It includes oil, an OEM Subaru filter and a drain plug crush washer. You still need tools and a way to dispose of the old oil.

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