Product Reviewed: SAE 0W-20 Signature Series 100% Synthetic Motor Oil (ASM)
Current Rating: 4.97 out of 5 stars
Votes & Reviews: 407 vote(s) and 1145 user reviews.
Reviewed by Jagath: 
Use it on my daughters Mitsubishi SUV.
Reviewed by Joseph:
Wow!! Not sure what the GM dealership was using on my free oil changes, but I noticed a huge difference running the Amsoil! Motor is way smoother!
Reviewed by Mike:
I use this product in all my cars and motorcycles .I also use their filters but sometimes I use K&N also.
Reviewed by Fermen:
Great oil wouldn't use anything else
Reviewed by Paul:
I've been a loyal Amsoil user these past 25 years. Love the long life of the products and the exceptional protection. True lay a company and products you can trust your vehicles to.
Reviewed by Robert:
I will use no other, regularly get 15 - 20 K between changes in my Honda Civic
Reviewed by John:
Great product, I use it in all my car's.
Reviewed by Edward:
I started using Amsoil in high school in 1974, because math teacher was a distributor. I have used it every since. Best oil on the market! I have used almost eight products so far.
Reviewed by Ron:
I love the products .,keeps my truck running like top. Starts easy in are cold winters .
Reviewed by Leonard:
I use this oil in my work truck. H ave 186,000 trouble free miles and love the fact I only need to change oil only 1 time a year.
Reviewed by Craig:
car oil changes. i like the longer life with longer life oil filter.
Reviewed by Billy:
I use this product 0w20 because any vehicle I drive is an investment, and I keep my vehicles in very good condition.
Reviewed by boilerman555:
Been using this in my honda civic since i bought it brand new. I change the oil around 20-24000 km each time. The extended drain intervals are great. I got 222,000 km on the car now and still running like it was brand new.
Reviewed by Spyridon:
It's a great product but I'm thinking about using the 5w20 racing oil next.
Reviewed by mc:
I change the Amsoil and filter on my cars every 12 months and have driven 5 different cars in that time period. It's gotten to where I feel like I'm wasting my time checking oil levels because not a drop is consumed in 12 months. Have used Amsoil in Dodge Caravan, Honda Cicic, Honda Accord, 2 Lexus ES's, 2 Lexus Rx's , 1 Lexus GS 300. Never any oil loss.
Reviewed by Arnold:
I trust Amsoil products to be the best, so I'll comment on the warehouse facility. I picked up my order at the warehouse because I like looking at the displays and chatting with the knowledgeable personnel.
Reviewed by Doc:
This is the second time I have filled my 2012 Toyota Tundra Crew with 0W-20 synthetic. Even though it takes 2 full gallons for a fill up its well worth the time and cost. This oil only has to be changed out once a year or within an extended driving distance, or hard service. My Tundra does see off road quite often and I've never had a worry about over heating or an other oil related issues. With a long life oil filter and air filter changed at the same time, I only have to change fluids once a year. That's awesome, as I travel quite often as a wounded Veteran, going to WWP events and also using my truck for Team Rubicon disaster relief efforts. The sticker on the window gets the word out, the truck running flawlessly is all the
proof I need. I'll keep using it as long as you guys keep making a great product.
Thanks SGT. Eric DeGroot
(U.S. Army Retired)
Reviewed by Rich:
I never would have thought that using a premium oil would improve MPG, but it has. I am getting 5% to 10% increase.
Reviewed by Andy:
I did an Amsoil flush and used this 0W-20 in my 2012 Acura TL with 45,000 miles on it right away you can hear the little bit of lifter ticking I had went away. Amsoil is amazing and there's no way I would ever use any other oil on any of my vehicles. I would suggest it to anyone and everyone it is simply the best!
Andy B
Reviewed by Kooch:
Increased fuel economy by 1 mpg
Reviewed by Zardiw:
I love this oil. It lasts for up to 25,000 miles, which is awesome. AmsOil Rocks!
Reviewed by NO:
THE PRODUCT IS EXCELLENT, BUT ORDERED ON TUESDAY ABOUT 10 A.M., U.P.S. TRUCK PULLED UP AT ABOUT 10 A.M. WEDNESDAY. WOW
Reviewed by Dwayne:
I have used Amsoil products in all my vehicles for many years. With my latest purchase I felt it was time to let people know how great these products are.
I was shopping for a new tow vehicle for our family. We love Suburbans however to get one that would meet our needs we had to go shopping for an old one as 2001-2006 were the only years a Burb could tow 12,000 pounds if it had the 8.1 L engine.
There was no way I could talk my wife into a pick-up truck or a diesel
so I was left with one choice and believe me they are had to find as few were made and many of those are long out of commission or in very poor shape.
As much as I was looking forward to a stronger tow vehicle I was dreading what the fuel economy would be. I finally found one in North Bay, Ontario but I lived just outside of Calgary, Alberta.
Before flying out to Ontario to pick up the truck I called the closest Jiffy Lube in Sudbury, Ontario and arranged for them to order in all the Amsoil products I wanted so they could change all the fluids in the truck before I drove the 3000km home to Alberta. I did everything, engine oil and filter, transmission, transfer case, front and rear differential, and coolant. It took about 3 hours to complete.
I hit the highway as soon as they were done. I have always been meticulous about keeping track of my fuel economy and I was curious how bad it would really be. I have read that 10-12 MPG Imp. is average unloaded and 6-8 MPG Imp. towing
was what I should expect.
Wow, was I surprised!
I had about 500 lbs of cargo in the truck with no passengers. Most of the long trip I averaged about 55-60 MPH. My average fuel economy for the entire 3000km trip was 17.5 MPG Imperial. Even one MPG more with a 7500 lb truck is something to get excited about. I do not think it is possible to attain fuel economy like this with out Amsoil, no matter how nice you drive.
I can't wait to see how it does on its first towing trip!
Thanks for making such great products.
Dwayne Loberg
Reviewed by Fatcat:
So far the Signature Series 0w-20 oil is doing great in my 2016 Honda Accord 6-speed manual.
My first oil change was at 5,000 miles and my mileage as gone from 35+ to 39+ mpg. I'm sure that Amsoil had something to do with it. Car runs smooth and
strong. Almost ready for my next oil change.
I'll be using the Signature Series in my Honda from now on.
Amsoil worked fantastic in my old 2003 VW Jetta TDI which had over 360,000 miles when I sold it and my friend who bought it from me will be using Amsoil in it as well (now has over 375,000 miles).
I'll be switching my Ram 6.7L Cummins 6-speed to Amsoil next change as well.
Though a little pricey, Amsoil makes good products that definitely protect your investment.
Reviewed by Charlie:
GOOD STUFF
Reviewed by JCAUPS1:
Use in my 2015 Yukon SLT-This is used primarily as my field service vehicle. I cover the Bay & Reno area & to date have 42,000 miles on my SUV. I frequently haul loads from a 1000 pounds & tow up to 3000 on occasion. I find it very hard to trust Oil Change facilities & the dealer takes all day so I change the oil myself knowing that I am using the best oil money can buy because I have tried the rest & Amsoil is the best.
Reviewed by Kmstraker:
My wife puts 250 kms a day on her 2010 Prius and I was tired of paying $100 for a 0W20 oil change at a drive thru every 7 weeks. Bought this Amsoil for its claim of extended oil change intervals. Yes it's more expensive initially with an EA oil filter, but when only changing oil every 35000 kms the savings add up. No oil loss during that time or any adverse experience. My 2000 Jetta TDI with over 500,000 kms was always serviced with Amsoil products and at extended intervals. Still running perfect every day.
Reviewed by Ben:
I've used Amsoil for about 30 years now. Used cars and new. My first oil change in the new car gets the Amsoil, and never anything else after that. I've had no maintenance issues due to oil in any of my vehicle, ever, and I actually run them for the full year or 25,000 miles as advertised. One of my vehicles is a Subaru, which calls for synthetic right from the start. I used to let the dealer do the oil changes, including using their own preferred oil brand, but I swear, when I switched it over to Amsoil it actually runs smoother and quieter. I don't know how or why, but it is what it is! My sons and my brothers use it as well. same results.
Reviewed by Ketchup:
Like title says! They do! I buy this stuff by the gallon case. We have 4 newer Hondas that use 0w20. I still change oil every 5000 miles. Honda and Amsoil say you can longer but my OCD won't let me go past 5000!!!!
Reviewed by Huskeratheart:
I've used this oil for over 7 years in my car and not a problem.
Reviewed
by Marty:
I use this product and Amsoil 0W-30 in my vehicles. They are both great products.
Reviewed by Astrohog:
I looked up the tests on amsoil as compared to other oils and amsoil showed superiority in most area's. This is my choice for my bike and car.
Reviewed by badass#1:
My boss turned me on to this product and he's been using it for years in end. I always used synthetic oils in my trucks and cars but never used amsoil, I can already tell a difference in gas mileage and performance in my car since I converted to this product. Very satisfied !
Reviewed by One time Tommy:
Use it in my 2010 Prius, once a year oil change.
Reviewed by Scott:
i was already using 0-20 in my Toyota and my Subaru, so I didn't really notice a difference in mileage. Oil analysis suggests the extended oil changes are easily doable, but I'll do another at 25000 to make me feel better. Swapping just the oil filter isn't bad at all........just not what I'm used to.
Reviewed by Jordan the Worker:
So far so good. Started using this as of 70,000 miles now at 110,000. I really like the once a year oil changes. I'd be interested in seeing an oil test.
Reviewed by Jimmy:
Protects at higher levels than the competition and is great in cold weather start ups.
Reviewed by Bill:
My latest use of Synthetic Series OW-20,in a 2016 Hybrid Ford Fusion. Smooth performance, and adding more miles per gallon. WONDERFUL!
Reviewed by Mike:
Been using Amsoil products on 3 service vehicles for a 20 year period and received 256K on my truck, 278K on my passenger car and 146K on my motorcycle. I know these products had a lot to do with those totals. Wouldn't use any other Brand EVER!
Reviewed by Rainmaker:
People tell me they don't use amsoil because of the high cost. But if you change the oil at 30, 000 mile intervals like I do, it actually costs LESS than paying for an oil and filter change every 5, 000 miles. And changing the micron filters every 10 to 15 thousand miles is very easy to do, plus you are getting a much better product using a full synthetic oil and your car's engine will last a lot longer. That's why all Nascar drivers only use a full synthetic oil. That's why jet airplanes only use a full synthetic oil. The protection, even at extreme temperatures is unparalleled. I had a real estate client who operated a fleet of 18 wheelers. He was so cheap he would change the oil at 100, 000 intervals, but he would change filters and do oil analysis along the way. But, my point is if he could operate all those trucks on a 100, 000 mile oil change schedule, it's really no problem for a passenger car to change oil at 30, 000 mile intervals because unlike regular oil a synthetic does not break down. The key is to do the micron filter changes on schedule, which usually require you add ftom a half quart to a full quart of oil at that time.
Reviewed by jcbunch:
So far I have good results and I am extending drain intervals top 10k miles even after towing 7500 pounds most of the engines life.
Reviewed by Peter:
I have used this oil in my Subaru for a number of years. every oil analysis comes back exactly as I'd expect, and I'm getting nothing but great performance from the oil. per mile cost is never worse than the typical synthetic competitors and I prefer the conservative margin of error this oil affords me...
Reviewed by Fernando Paterson:
0w20 are the lowest viscosity oils currently used for cars. The upside is better fuel economy due to lower drag, therefore less energy wasted to pump oil inside the engine.
However, the downside is, lower viscosity oils does not protect critical components at high heat & high stress situations. The oil is too thin. The film of oil that keeps two moving parts from touching each other easily burns off due to lower film strength. This results in accelerated wear!
With research, I have found that Amsoil's signature series 0w20 is the only oil that can provide adequate levels of protection. If your driving a vehicle that requires 0w20 or 5w20, then look no further, get this 0w20 motor oil or the Amsoil signature series 5w20. These two oils will help your engine see high mileage before requiring major repairs. Use the "best money can buy" 20 weight oil as a cheap insurance against engine wear. Do not bother with lower grade oils or even Amsoil's own XL or OE series oils.
Reviewed by Jason Brown:
I installed Amsoil 0W-20 Signature Series in my 2011 Honda Odyssey with about 30,000 km's. Prior to this, it was running on dealer installed oil.
With Amsoil the
average fuel consumption meter dropped from 13.5L/100km to 11L/100km for the exact same weekly driving routine (lots of in town driving).
This translates to about 125km more driving range for a tank of 80 litres. That's about $15-20 in fuel savings per fill up. I do about 30 fill ups per year. So the total savings is about $450-$600.
I only spent about $50 for 5 bottles of Amsoil 0W-20 ASM, which will last me a year, while saving 10 times that in fuel!!! Never thought motor oil can do so much. Thanks to Amsoil
Canada
United States
I would buy this product again
Best oil for cold weather start ups. It increased my fuel economy from 27 average to 29