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Customer reviews for Mobil Delvac 1300 Super Heavy Duty Premium Synthetic Blend Diesel Engine Oil 15W-40 4, 1-gallon bottles for
Mobil Delvac 1300 Super Heavy Duty Premium Synthetic Blend Diesel Engine Oil 15W-40 4, 1-gallon bottles
4.8 out of 5 stars
stars989 ratings459 reviews
  1. 5 stars92% (908)
  2. 4 stars4% (42)
  3. 3 stars2% (15)
  4. 2 stars1% (7)
  5. 1 star2% (17)

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Showing 371-380 of 459 reviews
Jan 23, 2020
Larson
5 out of 5 stars review

Verified Purchase

Great price on sale

Great price on sale

Helpful?71PFIMTJQYAV7192496819
Dec 17, 2020
Abel magana
5 out of 5 stars review

Verified Purchase

Driver

Good product

Helpful?71PFIMTJQYAV7192496819
Apr 20, 2021
Ace
5 out of 5 stars review

Verified Purchase

Best oil

Awesome

Helpful?71PFIMTJQYAV7192496819
May 5, 2021
Clint
5 out of 5 stars review

Verified Purchase

Great product

Great price when on sale

Helpful?71PFIMTJQYAV7192496819
May 21, 2025
Dennis
5 out of 5 stars review

Verified Purchase

Good price relable

Review from walmart.com
Helpful?71PFIMTJQYAV7192496819
Nov 21, 2025
JAMES
5 out of 5 stars review

Works great in my 2003 Kenworth W900L C-15

I've used this oil in my 2003 Caterpillar C-15 for years now. Highly recommend it.

Helpful?71PFIMTJQYAV7192496819
Oct 16, 2025
Gary
5 out of 5 stars review

Delo oil is good for my flat tappit 350

I use it in my 1994 Chevy C3500 Crew Cab with a gasoline 350 and it runs and drives great.

Review from walmart.com
Helpful?71PFIMTJQYAV7192496819
Jul 1, 2020
Patty 22
5 out of 5 stars review

Verified Purchase

Mobil Delvac

This is the oil I wanted and it was delivered right to my door.

Helpful?71PFIMTJQYAV7192496819
May 12, 2021
Krys
5 out of 5 stars review

Verified Purchase

Good deal

Great oil. Great price. This is all I use in my semi truck that runs everyday making a living.

Helpful?71PFIMTJQYAV7192496819
Jan 23, 2013
sunshine78
5 out of 5 stars review

Our ONLY oil

Have used this oil for 20 years in all 4cycle engines from lawnmower, snow blower, diesel and gas vehicles. Car, Toyota diesel, would go 5000 miles without adding any oil between changes until finally sold at 335,000 miles.

Helpful?71PFIMTJQYAV7192496819