☰
Shop by Vehicle
Find AMSOIL Near You

Customer Ratings & Reviews

Signature Series Max-Duty Synthetic Diesel Oil 10W-30

Product code : DTT1G-EA

5 star rating Read 73 reviews

Customer Rating

5

97% would recommend

  • 5 72
  • 4 1
  • 3 0
  • 2 0
  • 1 0

Signature Series Max-Duty Synthetic Diesel Oil 10W-30

5 star rating Based on 73 reviews
  • 5 star rating
    Always the Smart choice
    By  MAC,  a  Verified Buyer  on  March 01, 2022
    Been using Amsoil since 2011, both in a 2001 HD and my F250 SD; no complaints, but more than 5 stars for sure!!!!!!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Smooth running diesel.
    By  JOHN,  a  Verified Buyer  from  DuBois Pa  on  February 19, 2022
    15 year old Kubota BX 24. Engine has never run this smooth.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    The viscosity held up good thru 10,000 miles
    By  RON,  a  Verified Buyer  from  Greenfied,IN  on  January 22, 2022
    No problems with oil
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Semi truck diesel oil
    By  AHMED,  a  Verified Buyer  on  January 09, 2022
    Liquid gold
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Oil revue
    By  SCOTT,  a  Verified Buyer  from  Nevada   on  December 31, 2021
    Works great in the heat
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Best
    By  Dale,  a  Verified Buyer  from  Sicamous  on  December 26, 2021
    I have run amsoil for 20 years no need for the rest when you have the best oil on the market .
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Good
    By  J GUADALUPE,  a  Verified Buyer  from  Houston   on  December 16, 2021
    👍👍👍👍👍good
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Exactly the right choice
    By  ALEX,  a  Verified Buyer  on  December 15, 2021
    If you’re wondering , this is the oil. Use it
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Amsoil 10w-30
    By  MIKKO,  a  Verified Buyer  on  December 14, 2021
    Love your products will use again!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    10w30 signature series for my 2022 f250
    By  BOB,  a  Verified Buyer  from  MI  on  December 13, 2021
    great oil would love if you still offered it in quart bottles to better fit ford applications taking 13 qts
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Ordered wrong oil, returned & ordered correct oil.
    By  CARY,  a  Verified Buyer  on  December 12, 2021
    Returned wrong weight oil, ordered & received correct oil. Have been WAITING WEEKS AND STILL HAVE NOT RECEIVED A CREDIT for my return. VERY UNHAPPY about that. Great products....so-so on customer service !!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Amsoil is the best
    By  Mark,  a  Verified Buyer  from  SD  on  December 10, 2021
    Ordered my oil online thru Amsoil and had it send to a general delivery post office in Savannah. Was notified that it was delivered, but when I got to the PO, they couldn't find it. After nearly 10 days of wrangling, the PO found the package right where it was supposed to be. Received my oil the day before I was to leave. I really believe that the PO is about as screwed up as it can be.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Great oil
    By  JW,  a  Verified Buyer  from  Post, Texas  on  October 19, 2021
    Have been running Amsoil diesel oil in my previous Ford Superduty 6.0. My new 2020 Superduty requires a different weight of oil, and have only had the truck long enough to change the oil/filter once, but not using any or smoking. Seems to be doing well
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    2018 F-150 3.0 diesel
    By  AARON,  a  Verified Buyer  from  Florida  on  October 07, 2021
    I started using Amsoil about a year ago. I’ve always been a big fan of mobile 1 until I was introduced to Amsoil from a friend. I did a lot of research and figured I’d give them a shot. I am very hard on all of my vehicles so I have a very strict PM program. I started using the signature series oil in my 2018 f-150 diesel and the first oil change I gained 2500 miles just from the oil monitor. I use to get about 5k out of the Ford spec oil for the 3.0 lion. The sound of the motor was much quieter and gained about 3 mpg more putting my average around 29 mpg.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Oil life
    By  ROBERT,  a  Verified Buyer  from  Edgewater,(Maryland)   on  September 13, 2021
    This product works great in my transmission in my boat.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    125000 miles TitanXD Cummins Diesel, always Amsoil since new
    By  WAYNE,  a  Verified Buyer  from  Florida   on  September 07, 2021
    Towing trailers based in Florida, travel throughout US and Canada including Alaska. Sub zero weather, extreme heat out west. Amsoil in all my vehicles since new.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Number one
    By  AHMED,  a  Verified Buyer  from  Houston,Tx   on  September 06, 2021
    Use 10w30 signature series for my semi truck.I couldn’t be happier awesome product
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Very good
    By  EUGENE,  a  Verified Buyer  on  September 05, 2021
    I feel like it’s the best oil I use in my life, engine work so smooth, and believe it getting more horsepower !!!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    10W-30
    By  MYKOLA,  a  Verified Buyer  on  September 01, 2021
    Nice products and service
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5 star rating
    Diesel engine oil
    By  ROBIN,  a  Verified Buyer  from  Stockton CA  on  August 31, 2021
    Awesome product. Have been using this product for a while in my semi truck. The engine still feels like it's new.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?