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frontpageSUCHaDEAL posted Yesterday 04:44 PM
frontpageSUCHaDEAL posted Yesterday 04:44 PM

5-Quart Mobil Full Synthetic High Mileage or Full Synthetic Motor Oil (5W-30)

$20

$25

20% off
Walmart
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Walmart has 5-Quart Mobil Full Synthetic High Mileage Motor Oil (5W-30) for $19.98. Shipping is free w/ Walmart+ (free 30-day trial) or on orders of $35+.

Walmart also has 5-Quart Mobil Full Synthetic Motor Oil (5W-30) for $19.98. Shipping is free w/ Walmart+ (free 30-day trial) or on orders of $35+.

Thanks to community member SUCHaDEAL for finding this deal.

About this item:
  • Mobil Full Synthetic High Mileage 5W-30 motor oil is designed for vehicles with over 75,000 miles, upgrading from a conventional or synthetic blend, or requiring full synthetic motor oil
  • Provides guaranteed protection that's 1.5X longer than our conventional and synthetic blend oils, up to 7,500 miles between oil changes*
  • Helps to prevent oil leaks, sludge, and deposit formation to help reduce engine wear with a balanced additive system formulation and extra seal conditioner
  • Provides excellent resistance to oil breakdown, for proven long-lasting protection, and maintains oil viscosity at high operating temperatures
  • Recommended for all types of gasoline-powered vehicles, including those with turbocharged engines, and meets API SP resource-conserving

Editor's Notes

Written by johnny_miller | Staff
  • Please see the original post for additional details & give the forum comments a read for helpful discussion.

Original Post

Written by SUCHaDEAL
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Walmart has 5-Quart Mobil Full Synthetic High Mileage Motor Oil (5W-30) for $19.98. Shipping is free w/ Walmart+ (free 30-day trial) or on orders of $35+.

Walmart also has 5-Quart Mobil Full Synthetic Motor Oil (5W-30) for $19.98. Shipping is free w/ Walmart+ (free 30-day trial) or on orders of $35+.

Thanks to community member SUCHaDEAL for finding this deal.

About this item:
  • Mobil Full Synthetic High Mileage 5W-30 motor oil is designed for vehicles with over 75,000 miles, upgrading from a conventional or synthetic blend, or requiring full synthetic motor oil
  • Provides guaranteed protection that's 1.5X longer than our conventional and synthetic blend oils, up to 7,500 miles between oil changes*
  • Helps to prevent oil leaks, sludge, and deposit formation to help reduce engine wear with a balanced additive system formulation and extra seal conditioner
  • Provides excellent resistance to oil breakdown, for proven long-lasting protection, and maintains oil viscosity at high operating temperatures
  • Recommended for all types of gasoline-powered vehicles, including those with turbocharged engines, and meets API SP resource-conserving

Editor's Notes

Written by johnny_miller | Staff
  • Please see the original post for additional details & give the forum comments a read for helpful discussion.

Original Post

Written by SUCHaDEAL

Community Voting

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Model: Mobil Full Synthetic Motor Oil 5W-30, 5 Quart

Current Prices

Sort: Lowest to Highest | Last Updated 2/20/2026, 11:51 PM
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Walmart$19.98

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senzervision
217 Posts
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You're correct that "synthetic" is a marketing term referring to the base stocks in the lubricant formulation meeting the minimum percentage as defined by a landmark court case referenced here: https://bobistheoilguy.com/forums...wn.301956/

However, Mobil 1 hasn't been full synthetic (100% Grp IV or Grp V) in probably a decade. Further, depending on the formulation and where it was blended, the percentage of PAO ("true synthetic", Grp IV; I don't believe M1 has had Grp V for a long time) present in the base stock blend can vary quite a bit, or be nonexistent altogether. What's important is that you pick the right viscosity multi-grade for your car/application that meets the minimum specifications dictated by the manufacturer (API category and/or ILSAC and/or specific OEM internal tests, such as Mercedes or VW tests).

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Yesterday 05:27 PM
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lesmir300Yesterday 05:27 PM
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Our community has rated this post as helpful. If you agree, why not thank lesmir300

Sale price is Mobil regular, not the Mobil 1 .....
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Yesterday 05:32 PM
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SUCHaDEALYesterday 05:32 PM
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Quote from lesmir300 :
Sale price is Mobil regular, not the Mobil 1 .....
thanks, didn't realize Mobil made just a Mobil Full Syth as well as Mobil 1. Always call it Mobil 1. Fixed it.
Yesterday 05:34 PM
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dazedxxxYesterday 05:34 PM
3,388 Posts
Neither oil available (as linked) at none of my dozen local wallmarts. Never seen that label design for the high milage either.
Last edited by dazedxxx February 20, 2026 at 10:36 AM.
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Yesterday 05:44 PM
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SUCHaDEALYesterday 05:44 PM
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Quote from dazedxxx :
Neither oil available (as linked) at none of my dozen local wallmarts. Never seen that label design for the high milage either.
Free shipping on two jugs.
Yesterday 06:21 PM
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dazedxxxYesterday 06:21 PM
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Quote from SUCHaDEAL :
Free shipping on two jugs.

Yeah i know, but just needed one for someone else car. Was suprised that the carry the same thing with a different label in store for $7 more.
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Yesterday 06:41 PM
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SUCHaDEALYesterday 06:41 PM
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Quote from dazedxxx :
Yeah i know, but just needed one for someone else car. Was suprised that the carry the same thing with a different label in store for $7 more.
Just a hint, you can order two for the free shipping and always return one to your store in a pinch for the credit.

Yes online pricing for oil is much less than the store price, and WMT doesn't price match its website either.
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Yesterday 06:50 PM
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whodiiniYesterday 06:50 PM
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Just so people are aware, the term "synthetic" is marketing jargon now and not a reflection of whether the oil is synthetic or not. Mobil 1 is made from a truly synthetic base, whereas many other "synthetic" oils including Mobil regular, Costco Kirkland synthetic are made from refined oils.
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Yesterday 11:51 PM
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senzervisionYesterday 11:51 PM
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Our community has rated this post as helpful. If you agree, why not thank senzervision

Quote from whodiini :
Just so people are aware, the term "synthetic" is marketing jargon now and not a reflection of whether the oil is synthetic or not. Mobil 1 is made from a truly synthetic base, whereas many other "synthetic" oils including Mobil regular, Costco Kirkland synthetic are made from refined oils.
You're correct that "synthetic" is a marketing term referring to the base stocks in the lubricant formulation meeting the minimum percentage as defined by a landmark court case referenced here: https://bobistheoilguy.com/forums...wn.301956/

However, Mobil 1 hasn't been full synthetic (100% Grp IV or Grp V) in probably a decade. Further, depending on the formulation and where it was blended, the percentage of PAO ("true synthetic", Grp IV; I don't believe M1 has had Grp V for a long time) present in the base stock blend can vary quite a bit, or be nonexistent altogether. What's important is that you pick the right viscosity multi-grade for your car/application that meets the minimum specifications dictated by the manufacturer (API category and/or ILSAC and/or specific OEM internal tests, such as Mercedes or VW tests).
Last edited by senzervision February 20, 2026 at 04:53 PM.
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Today 01:02 AM
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E4300
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Quote from senzervision :
You're correct that "synthetic" is a marketing term referring to the base stocks in the lubricant formulation meeting the minimum percentage as defined by a landmark court case referenced here: https://bobistheoilguy.com/forums...wn.301956/

However, Mobil 1 hasn't been full synthetic (100% Grp IV or Grp V) in probably a decade. Further, depending on the formulation and where it was blended, the percentage of PAO ("true synthetic", Grp IV; I don't believe M1 has had Grp V for a long time) present in the base stock blend can vary quite a bit, or be nonexistent altogether. What's important is that you pick the right viscosity multi-grade for your car/application that meets the minimum specifications dictated by the manufacturer (API category and/or ILSAC and/or specific OEM internal tests, such as Mercedes or VW tests).
US specs are designed to avoid the EPA's CAFE tax. Best protection for extreme hot and cold weather is 0W40. However, this oil is not as shear stable as 5W30. Fresh clean oil is also important to reduce oil seal leak. Suspended contaminants in the oil act as microscopic abrasive particles. Dark colored oil has more suspended particles.
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Today 02:19 AM
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senzervisionToday 02:19 AM
217 Posts
Quote from E4300 :
US specs are designed to avoid the EPA's CAFE tax. Best protection for extreme hot and cold weather is 0W40. However, this oil is not as shear stable as 5W30. Fresh clean oil is also important to reduce oil seal leak. Suspended contaminants in the oil act as microscopic abrasive particles. Dark colored oil has more suspended particles.
GM has it's own specs (Dexos), which go beyond the US CAFE bar.

I don't see how the remainder of what you said, while mostly true, is pertinent to the previous comments (mine, and the user I was replying to re: synthetic oils). Particle suspension is largely controlled by additives, mixing throughout the oil circuit, and hopeful removal by the filter. Further, color isn't the most perfect indicator of oil degradation. Like food dye, it doesn't take much fine particles to change the color yet the performance is nearly the same (as in, not hindered from fresh). Finally, there's always residual oil in the sump after a drain/change (hang-up). When the fresh oil circulates, you'll see the color change almost instantly from driving it around.
Today 03:21 AM
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EsenteToday 03:21 AM
760 Posts
So... This (or Kirkland Full Synthetic) 5W-30 is fine if I change oil every 3000 miles?
3
Today 03:24 AM
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GoldenDad21Today 03:24 AM
186 Posts
Quote from Esente :
So... This (or Kirkland Full Synthetic) 5W-30 is fine if I change oil every 3000 miles?
Definitely.
1
Today 04:58 AM
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NackJToday 04:58 AM
457 Posts
Quote from Esente :
So... This (or Kirkland Full Synthetic) 5W-30 is fine if I change oil every 3000 miles?
Use the right weight and change every 5k miles is the conclusion I have made.
1
Today 10:34 AM
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megablankToday 10:34 AM
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Quote from dazedxxx :

Yeah i know, but just needed one for someone else car. Was suprised that the carry the same thing with a different label in store for $7 more.
you'lll need a second one in a year regardless

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Formula1GP
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Today 10:36 AM
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Costco Kirkland Synthetic performs just as well compared to Mobil 1
2

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