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  • Mobil Delvac Extreme Heavy Duty 15W-40 Full Synthetic Diesel Engine Oil (Up to 10 Gallons @ $2.45/Quart AR) 1 Gallon $19.77, After Rebate $9.77
frontpage Posted by BabyBubba • Yesterday
frontpage Posted by BabyBubba • Yesterday

1-Gallon Mobil Delvac Extreme Heavy Duty Full Synthetic Diesel Engine Oil (15W-40)

$9.75 after $10 Rebate

$20

Walmart
27 Comments 11,597 Views
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Note: We summarize the promotion terms as offered by the provider, but be sure to personally verify all information and requirements before submitting; we are not responsible for ineligible submissions.

Walmart has select Mobil Delvac Extreme Heavy Duty Full Synthetic Diesel Engine Oils (15W-40) on sale from $9.77 after a Mobil Delvac Rebate, see below for details. Shipping is free w/ Walmart+ (free 30-day trial) or on orders of $35+, otherwise select free store pickup where available.

Thanks to Community Member BabyBubba for sharing this deal.
  • Note: Maximum total of up to $100 back per household, please check the rebate form for full terms & details. Rebate is paid our as a Visa Prepaid Card. Pricing and availability for purchase may vary by location.
Available Options:Rebate Notes:
  • Only eligible Customers may receive a rebate.
  • Fully complete the online proof of purchase form at promotion.mobil.com/offers/delvacrebate. Upload an image of your receipt(s) from a participating retailer dated during the Promotion Period with Eligible Product(s) circled. All online submissions must be completed by 11:59:59 p.m. CST, May 7, 2025. You must complete a separate online offer form for each receipt with Eligible Products. Illegible images will not be accepted.
  • For online purchases, upload the invoice and final delivery or pick-up receipt for your qualifying purchase from a participating retailer.

Editor's Notes

Written by SaltyOne | Staff
  • Offer valid for a limited time only / while supplies last.
  • Please see the Rebate Page for full terms & conditions.
Please see the original post for additional details & refer to the comments below for discussion.

Original Post

Written by BabyBubba
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Note: We summarize the promotion terms as offered by the provider, but be sure to personally verify all information and requirements before submitting; we are not responsible for ineligible submissions.

Walmart has select Mobil Delvac Extreme Heavy Duty Full Synthetic Diesel Engine Oils (15W-40) on sale from $9.77 after a Mobil Delvac Rebate, see below for details. Shipping is free w/ Walmart+ (free 30-day trial) or on orders of $35+, otherwise select free store pickup where available.

Thanks to Community Member BabyBubba for sharing this deal.
  • Note: Maximum total of up to $100 back per household, please check the rebate form for full terms & details. Rebate is paid our as a Visa Prepaid Card. Pricing and availability for purchase may vary by location.
Available Options:Rebate Notes:
  • Only eligible Customers may receive a rebate.
  • Fully complete the online proof of purchase form at promotion.mobil.com/offers/delvacrebate. Upload an image of your receipt(s) from a participating retailer dated during the Promotion Period with Eligible Product(s) circled. All online submissions must be completed by 11:59:59 p.m. CST, May 7, 2025. You must complete a separate online offer form for each receipt with Eligible Products. Illegible images will not be accepted.
  • For online purchases, upload the invoice and final delivery or pick-up receipt for your qualifying purchase from a participating retailer.

Editor's Notes

Written by SaltyOne | Staff
  • Offer valid for a limited time only / while supplies last.
  • Please see the Rebate Page for full terms & conditions.
Please see the original post for additional details & refer to the comments below for discussion.

Original Post

Written by BabyBubba

Community Voting

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+22
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Price Intelligence

Model: Mobil Delvac Extreme Heavy Duty Full Synthetic Diesel Engine Oil 15W-40, 1 gal

Deal History 

Sale Price
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Sort: Lowest to Highest | Last Updated 3/15/2025, 11:36 AM
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Walmart$19.77
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Top Comments

The rebate combined will the rollback discounted price is the important part, and i posted the most popular viscosity for reference. Anyone interested can take the 15 seconds to go find the 10W-30 or other viscosity they need after clicking through to Walmart. That takes less time (and is certainly more productive) than commenting that this is not the right viscosity for their application.

27 Comments

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Yesterday
3,356 Posts
Joined Oct 2010
Yesterday
brotherhpj41
Yesterday
3,356 Posts
Walmart.com says this is no match for my 6.0 diesel....I've always used 15w-40
Last edited by brotherhpj41 March 14, 2025 at 10:06 AM.
2
Yesterday
126 Posts
Joined Nov 2011
Yesterday
badman9
Yesterday
126 Posts
What grade of oil do you need? 5w-40 or 10w-30?

Both are available in delvac, inculding on rebate
Original Poster
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Yesterday
BabyBubba
Original Poster
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Quote from badman9 :
What grade of oil do you need? 5w-40 or 10w-30?

Both are available in delvac, inculding on rebate
The rebate combined will the rollback discounted price is the important part, and i posted the most popular viscosity for reference. Anyone interested can take the 15 seconds to go find the 10W-30 or other viscosity they need after clicking through to Walmart. That takes less time (and is certainly more productive) than commenting that this is not the right viscosity for their application.
Last edited by BabyBubba March 14, 2025 at 08:23 AM.
Yesterday
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Yesterday
beakeru2
Yesterday
925 Posts
Quote from BabyBubba :
The rebate combined will the rollback discounted price is the important part, and i posted the most popular viscosity for reference. Anyone interested can take the 15 seconds to go find the 10W-30 or other viscosity they need after clicking through to Walmart. That takes less time (and is certainly more productive) than commenting that this is not the right viscosity for their application.
This would NOT work in my 2 stroke yamaha outboard motor !
(j/k, ... agreeing with you)
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BabyBubba
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Quote from beakeru2 :
This would NOT work in my 2 stroke yamaha outboard motor !
(j/k, ... agreeing with you)
Ha! I no longer coddle those who present kindergarten-level problems in the comments like they are perplexed and expect someone to jump in and fix it for them. More and more lately I feel like they're trolling since the answers are so obvious.
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BabyBubba
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Quote from brotherhpj41 :
says this is no match for my 6.0 diesel....I've always used 15w-40
This is top of the line diesel engine oil. Don't put too much faith in retailer vehicle application recommendations; they are wrong on a regular basis. Your owner's manual always has viscosity and grade information for oil selection.
1
Yesterday
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Eugenius11
Yesterday
31 Posts
Can it be used in gasoline engines? I heard some are using exclusively diesel engine oil in all cars including non diesel

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brotherhpj41
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If my research is correct this oil is not on Fords approved list because the oil is high in zinc which might not work well with the oil cooler
1
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BabyBubba
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Quote from Eugenius11 :
Can it be used in gasoline engines? I heard some are using exclusively diesel engine oil in all cars including non diesel
Lots of people use it in motorcycles and small engines, but the zinc content doesn't go well with gasoline engine catalytic converters, so gas engine automotive use is usually not recommended. There's a lot of information on the net about this.
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18h ago
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18h ago
steezyb
18h ago
41 Posts

Our community has rated this post as helpful. If you agree, why not thank steezyb

Diesel vehicles will have an oil spec. European vehicles tend to have their own standards. For example my sprinter van specs MB 229.5. This oil does not meet this requirement. Anecdotaly, I get really bad turbo bearing noises if I run off spec.

Always good to check your oil spec if purchasing own oil.
1
15h ago
8,566 Posts
Joined Nov 2008
15h ago
hungrytiger
15h ago
8,566 Posts
Lawn mower/generator?
1
15h ago
70 Posts
Joined Dec 2022
15h ago
MellowRecess8806
15h ago
70 Posts
This or Mobil Diesel Truck oil???
14h ago
1,394 Posts
Joined Mar 2012
14h ago
Chevyguy85
14h ago
1,394 Posts
Bought 2 5 gallon buckets a month ago for $89 too. Usually get the delvac 1300 but after cash back and rebate this came out cheaper.

Anyone know the trick to getting Mobil to accept online order receipts for the rebate? I need to check again, but I've submitted this twice and they're suing the info needed isn't on there. Even though I circled the product. I need to go and check the site again and call the help line if needed. Just seeing if someone knew how to make it work by chance.

*edit*
Well rebate was accepted on the 2nd or 3rd try. Can't pull up what I did on my phone though.
Last edited by Chevyguy85 March 15, 2025 at 05:49 AM.
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13h ago
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13h ago
Shock96
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13h ago
2,042 Posts
I use this and other diesel oils in my 460 Ford van. 12 years now and zero issues with the catalytic converter so I am not sure how accurate the data is.

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9h ago
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Joined May 2019
9h ago
AFC118
9h ago
184 Posts
Quote from MellowRecess8806 :
This or Mobil Diesel Truck oil???

That is in fact what it says.

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