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 Big Deal: 
It pays for itself in increasing mileage and extended drain intervals- win win, plus all these contribute to less waste oil and sustainable practices
Reviewed by
Chris:
Regular use, nothing extreem. My vehicle did have slight idle issue, possibly from gasoline impurities. After switching to Amsoil and oil filter it runs completely smooth and purrs like a kitten.
Reviewed by Rex Packard:
Works really good gave me better mileage
Reviewed by Brian:
I invested in a Lexus LX570 that should go a half million miles. The best oil available is a small investment to keep this rig going for a few decades
Reviewed by Carl:
I use nothing but Amsoil motor oil in all my cars!
Reviewed by
Cam:
Use this in my Subaru XV. Engine runs great, and Blackstone says it works. Happily run this for the extra piece of mind.
Reviewed by Bell:
Wonderful product. Im never going back to conventional oil. I feel like an idiot for using it for as long as i did. Bottome line, better fuel efficiency, longer gas mileage, it feels like my engine glides with this oil. Do it!
Reviewed by 7cbreeze:
Use this oil on a Lincoln hybrid. The car is very sensitive to changes. The drive being the same day in day out. Changing to this oil improved fuel economy by 1.5 mpg. Engine runs smoother also.
Reviewed by Fix It Daddy:
I have used other synthetic oil's from Royal Purple, Redline and Pennzoil and this one exceeds them by far!!!
Reviewed by Yama Otoko:
I have used Amsoil engine oil and oil filters for the better part of each decade dating back to the 1980s. I have had my vehicles serviced at Honda dealerships since then. Most of the time that I have had a few major engine services performed, I have asked about the condition of the engine and the oil and have always received a positive report.
Currently, I drive a 2015 Honda CR-V. I believe that its average fuel economy of ~31mpg in a combination of city & highway driving is attributable to the Amsoil "Signature
Series 0W-20 Synthetic Motor Oil" that I run in my CR-V's engine.
Reviewed by Dave:
The engine is running smoother and has more pep...greater response!
Reviewed by Jeff:
I have been using AMSOIL now for about ten years. I have been very satisfied with the quality and affordability of this oil. Will continue to use in all of my vehicles. I purchased a new 2016 Silverado and immediately replaced the engine oil with AMSOIL.
Reviewed by Mr. HoneyDo:
I don't have any technical information, but I'm happy with the performance and mileage I'm getting in my Silverdado with a combined highway and stop and go daily commute.
Reviewed by Tundoo tower:
I've been using this in my vehicles for years and it's always proved valuable! I notice quieter engines, improved fuel economy, and better protection. Had it analyzed in several types of engines and driving conditions and it's been an outstanding performer. Other oils do not keep the quality and consistency over the years like this does. It's the first thing I do too any new vehicle I get.
Reviewed by robshe:
Expect the best out of my vehicles, therefore only use the best oils
Reviewed by Road bumper:
I've been using this in my vehicles for years and it's always proved valuable! I notice quieter engines, improved fuel economy, and better protection. Had it analyzed in several types of engines and driving conditions and it's been an outstanding performer. Other oils do not keep the quality and consistency over the years like this does. It's the first thing I do too any new vehicle I get.
Reviewed by D.J.:
I have 311,000 miles on my little insight. Change the oil every 10000 miles or so. Not a single problem with it. Product always delivered very quickly. good stuff.
Reviewed by Michigander:
Since we changed to Amsoil the mpg has gone up 5 mile /gallon extra on average. Plus in winter it is easier to start with the vehicle being parked out doors, huge difference. Change oil less frequently we can put on 20,000 miles/year seeing how I am in accounting if you extrapolate that experience over the millions of vehicles in the US, we could as a country save a ton of oil in petroleum used to lubricate and better gas mileage, what if the government alone changed to synthetics, wow.
Reviewed by Keith:
Amsoil has the best product on the market. I use it in all of my car and even my small engine equipment.
Reviewed by KB:
I have been running this oil and the trans fluid and been very satisfied . Amsoil does NOT ruin your gaskets and seals like some others which i wont name.
Reviewed by Steve:
I have 120,000 miles on my vehicle. 0W-20 has out performed my expectations. Changed every 12,000 miles.
Reviewed by Ansoil:
Use Amsoil in all of our vehicles including the tractor! We have a 08 Cobslt with 265k Mike son it and still runs like a top!
Reviewed by Moose:
I used this oil in my 2013 Toyota FJ Cruiser, which I use as my off-road vehicle and my daily driver. Compared to the other most recommended oil in my community, I found Amsoil to perform better. You may ask how I know it performs better. Well, I have been working on my family's cars since I was 13, so for about 33 years. I live where temps range from wind chill of -20F to heat index of 115F, and some days in the year the actual high between two days will change 40F. So how do I know it performs better? I can hear it, and I can feel it. I know that sounds silly, but growing up with a car that broke down 40 times in the first 4 years that I had it, I became very in tune to the sounds and feel of vehicles. Amsoil engine oil made my engine run quieter (on a 40,000 mile engine) and smoother (feel it in the pedal and floor vibrations from the engine bay).
Reviewed by Wmartinez94:
Since the day I first put this oil in my car's engine, never had any grinding or locking issues. Amazing product. Very reliable. Orders get shipped on time and arrive on time. Won't go wrong with using this fine line of synthetics.
Reviewed by Jbel:
I have been using Amsoil for nearly 10 years now and the extended service intervals are a time and cost saver. I have gone 22,000 miles in normal New England weather and the oil was still slightly golden. Thanks.
Reviewed by DD:
I started using Amsoil in my Harley Davidson after reading the literature and being very impressed with the high quality of all its products. I also used in my other vehicles and will use nothing else.
Reviewed by Mongo:
01 civic ex honda,306460 miles,still gets 38mpg.had used 0-20 signature since 25,000 miles.The numbers speak for the oil.
Reviewed by John:
This motor oil provides superior lubrication, engine cleaning, and fuel economy.
Reviewed by Rick:
We must keep our vehicles well lubed-why would you not use the best quality lubricants known to man? I think of it as a no brainer.
Reviewed by Eddie:
My truck has been running smooth and cool even in the hit weather. Love the oil.
Reviewed by ridgerunner rick:
In all my(and others) passenger vehicles.
Reviewed by Rick:
Years ago I read a synthetic oil life study. The study was very thorough, using different brands of oil, and filters. Amsoil came out on top.
Another thing discovered during this study was shocking. Changing your oil increases engine wear. The oil changes we're done when the TBN reached a low level, and the first sample analyzed after the change always showed higher levels of wear metals. This
abated by the second sample.
My Subaru Forester is the first new automobile I've purchased. I need it to last a long time. I'm running Amsoil signature, and a bypass filter. I'm going to have the oil analyzed regularly, and base the change interval on the results.
I hope it will last the rest of my life. I'm 63, so I've still got aways to go.
Reviewed by mrdoow:
2015 Mazda CX-5 purchased new. Car computer reported 24 - 26 average MPG. Switched to Amsoil at 32000 miles and experienced instant MPG increase. I have 10000 miles on Amsoil now and average MPG is 29 - 31. Considering the MPG performance increase after switching to Amsoil, I'd say the two years of free dealer oil changes was a money loser.
Reviewed by Teddy R.:
Hands-down this is the best oil in the
world for any vehicle you own.
I've use this oil in my cars and trucks since I've owned them I will never go back to any other type of oil besides Amsoil best product in the world
Reviewed by
Streetglider:
Get better gas mileage and longer time between oil changes
Reviewed by Adam:
This oil is fantastic. I run it to its max service interval with the right filter so I change once a year. Cold start temps down to -35C in winter without plugging in and has never let me down.
Reviewed by Malcolm:
Top quality. The fuel savings over manufacturers recommended oil change intervals pays for the oil.
Fast delivery, and everything I need.
Reviewed by Ironrail:
I have been using AMSOIL for the past 40 years. I fully trust any product with the AMSOIL logo on it. I use it on anything that requires any kind of lubrication. It truelly is the best.
Reviewed by Mannyk91:
Once I tried amsoil 0w-20 signature series for the first time in my first car I loved how smooth it had run and how it just doesn't break down like other oils , ive switched all my family vehicles to amsoil and they love the oil change intervals plus they love the price I can get it for ,I will continue using oil the best oil on the market that has the reputation I want to keep my vehicles going for a lifetime
Reviewed by Stan:
It is expensive, but the ability to change once per year is cost effective. Good oil, engine parts appear clean and wear free!
Reviewed by Spudrunner01:
I use the amsoil products because they are the best of the best , use on my guns, the signature series in my car and filters, great stuff. Try it you won't be disappointed
Reviewed by Hobbleybod:
Pure Butter!
Reviewed by jd:
I only use Amsoil in my BMW Honda and Toyota
Reviewed by RLove:
Seems to be working great in my subaru Forester!
Reviewed by Tom:
Best synthetic on the market hands down
Reviewed by Morpheous:
One word AWESOME. I've been using this oil in all my cars for past 3 years, and it has never let me down.
Reviewed by Gregg Young:
If 5w-20 is recommended then you better use 0w - 20.
Reviewed by hopewell8899:
I change oil every 30000 km and the old oil still thick and greasy.My van is about 180000 km and still like new.
Reviewed by LGC Driver:
Have used AMSOIL for 15 years. Never had an oil related issue in any vehicle. Best of the best!!
Reviewed by Brett:
Every auto I buy, Amsoil goes in along with their filters....
Reviewed by Steve:
Excellent products! Just bought a 2017 Subaru Outback. Used Amsoil 0-20W and Amsoil Oil Filter. Long time consumer.
Great stuff. Run in all of our family cars
Reviewed by Shake n bake:
Always use in my daily driver 4 years and 200,000 miles still smooth and strong
Reviewed by Papalewy:
My SUV probably doesn't need the quality of synthetic oil I use like Amzoil but for me it's all about peace of mind and therefore well worth the price. Been using it for years and it's never let me down.
Reviewed by Ironrider1550:
I like the extended drain possibility of this oil. It saves me money and time. Very great performing oil.
Reviewed by Josh:
Love this oil for my silverado. Truck runs fantastic and have not had to add a drop in between oil changes. Highly recommended.
Reviewed by Tu D Truong:
I like vey much AMSOIL fully suynthetic keep my engine high performance
Reviewed by JPM:
Long time user of Amsoil in all my vehicles. Wife's Honda Accord, my GMC Sierra and Corvette Z06. Outstanding performance oil, filters and gear oils. Would never use anything else. Order online one day and here the next. Oil analysis shows great results.
Reviewed by MACT:
Stopped using AMSOIL due to metal wear. The engine have never shown metal wear in testing with previous oils of different brands. The oil also changed viscosity and lost about 1/2 quart. I have a similar engine identical and 10K builds separate the two vehicles. I do not recommend 0W20 signature oil for use in city driving conditions.
Reviewed by Wayne L:
I only use Amsoil in my vehicles. My cars are expensive, well-maintained and deserve the best oil. Mercedes SL550, Porsche Boxster and Lexus hybrid. I never worry about the oil failing for any reason, which gives me peace of mind.
Reviewed by Randy:
I use And oil in my wife's car, my pick-up and my motorcycle. Have used it for years. I would highly recommend Amsoil.
Reviewed by Cartz:
Excellent oil for my engine and for my brothers cars. Been using it for years and keeps the engine clean and my okd 2004 honda pilot with 220k drives like brand new.
Reviewed by Dave:
Great oil to use all the time, 15,000 mile or a year which ever comes first saves time and money, environment too!!
Reviewed by Doc:
I use amsoil inn both my vehicles. Both tractors and mowers.
Reviewed by Wrench Hand:
This product is the best deal in the long term due to the extended oil change and life of the oil. I use it in my Ford products
Reviewed by Timchenko Dimitri:
Use in my Tundra, lasts longer, cost effective and better quality than whatever the dealership puts in.
Reviewed by Biner:
The day I brought home my new F250 4x4 I dumped the oil and replaced it with Amsoil OW20. My truck is 12 years old and run's like a champ. Amsoil in motor,trans, both rears, and transfer case. It's a gaser and I get better than 20 mpg on the highway.
Reviewed by Jerry Rumba:
I purchased the Signature Series 0W-20 oil for my son for his wife's 2013 Subaru Forester for topping up. Subarus with the 2.5 boxer engine seem to use some oil in general. They live far enough away that I can't help with oil changes, but they have two Subarus and they keep oil in the vehicles for top-up's especially on long trips.
Reviewed by DUCK:
Been using Amsoil fo about 35 years with great results in performance and better gas mileage
Reviewed by Bob:
This is the best oil protection you can get for your vehicle. The once a year or recommended mileage is great. It's rating is the highest in quality and protection.
Reviewed by J.A.:
We switched over to Amsoil at around 12k on our 2016 Corolla. We were able to see better fuel economy right away, with 2-3 miles per gallon.
Reviewed by Bob:
I've been using amsoil since 1973, and have not had a single car have any mechanical failure. About 1 million miles with a motor home, two trailers and a dozen automobiles.
Reviewed by ScottT:
Engine protection unmatches, extended oil changes and it Amsoil!!
Reviewed by Naj:
Used it for years
Reviewed by RoboRob:
The MFGs new oil specs leave me a little concerned about trading engine life to increase gas mileage.
Personally I would rather loose a few miles per gallon and be left with a longer lasting engine.
Considering my new Subaru Outback is under warranty I will use there recommended oil viscosity of 0-20.
But I have to admit I am not convinced an oil this thin is the best for
any motor.
So if I must use an oil this thin I want the very best oil I can buy.
I turned to Amsoil for protecting my motor.
Reviewed by Highkm:
SS 0w20 in all likelihood is the best motor oil on the planet. The protection you get, the longevity of the oil and the price is not matched by any other manufacturer.
Reviewed by Gussgubbalubbage:
I purchased a brand new Subaru outback in may of 2016 and will have over 20,000 on it by the time one year comes around my vehicle runs fantastic, did I mention this is an extremely weather environment Anchorage AK. 20 below no problem, purrs like a kitten oil is clean even at 5000 miles love the oil filters you guys make the best there is!
Reviewed by Old Pilot:
I use this product on my and my wife's Honda CRV. Don't have any hard data but it appears that oil changes are less frequent based on the on board sensor.
Reviewed by Montague Wrangler:
Using AMSOIL with their filter protects my car up to 10,000 miles and still tests good.
Reviewed by Bushwhacker:
I have been using Amsoil products for over 10 years. My 2010 Toyota Prius has over 250,000 thousand miles and it still performs well.
Reviewed by Dan:
227,000 miles on my 2003 Chevy pick-up. No oil consumption.
Reviewed by None:
Overall best out there
Reviewed by lotoofla:
When I bought my '13 Subaru Empreza, the dealer said that the engine must use synthetic 0w-20 oil, so I of course chose Amsoil's 0w-20 Signature oil. FYI this car is suppose to have a high oil consumption engine, but I have never added any oil. Another thing the dealership told me is NEVER EVER USE MOBIL 1 oil as it will wreck the automatic cam timing mechanism.
Reviewed by none:
I am a retired senior citizen with put a lot om money. therefore I am thinking of ONLY getting the next grade down on my amzoil purchases, instead of the signature series. The product is so good ,I will save money by going to the next step down in quality, which is as good as any other top of the line motor oil. How many products do yoou buy where you can get their second best and be better then any of the competition..
Reviewed by Gus:
I have 3, 4 cylinder cars with over 100K, no oil leaks, no oil related issues longer oil change cycle,
have not used any other type oil since they were new
Reviewed by Cui..:
13k about it..so far running smooth..
Reviewed by Hitman:
Been using amsoil over 15 years; that is all I ever use
Reviewed by 204man:
Love how long between oil change
Reviewed by Pun:
Personal oil changes. I like the fact you don't have to do oil changes for a year or 25,000 miles
Reviewed by Ray:
The oil is advertized for extended oil change intervals, far more than the manufacturer recommendation. Following manufacturer change interval of 10K miles will ensure my engine and turbo will be protected by this oil.
Reviewed by MARK:
I am a high-mileage driver >1,000 mi./mo. I got so tired of going to get my oil changed every month. My truck has 2 skid plates underneath it that have to be removed for an oil change. From the time I left work and returned for an oil change was typically 1-1/2 hours. Now, It's every 3 months!
Reviewed by Douglas:
Always easy, efficient and fast. I've used Amsoil for 30 plus years. In everything from motorcycles to
Reviewed by
Richard:
The Best Oil for your car makes it run better than any other oil I have ever used, you will feel the difference in you car's performance.
Reviewed by ROGER:
A friend recommended Amsoil to me about 35 years ago and I have used nothing but since. Many cars trucks motorcycles airplanes boats and lawn equipment
always happy..
Reviewed by Chris:
Great product! 2.5 to 3 mpg improvement!
Reviewed by Chuck:
I use Amsoil 0W-20 in my daily drivers, a 2008 Scion XD and currently a 2012 Honda Civic coupe. My workhorses receive roughly 110 miles a day / 24 to 26,000 miles a year. The Scion had over 186,000 miles on it when it was involved in an accident and was "totaled" in 2015. The engine never missed a beat, its last duty was to move its smashed up self onto flatbed tow truck.
Reviewed by Melvin:
I have been using this oil for years and my cars and trucks, all run cooler on this than they did on reg.oil.
All of them start up easier in the cold weather and here it gets down below 0.Best oil I have found in my 74yrs. of life..
Reviewed by Frederick:
Perfect in my cars all year round
Reviewed by Cory:
I use this in my brand new Subaru after 600 miles. Been happy as a pig in poop since. Been using Also in for 15 years in everything I own. Very satisfied.
Reviewed by Steven:
This stuff is the real deal, EXELLENT Product.
Canada
United States
0w20 sny oil
used this product for years and it keeps my wifes 2004 honda hybrid running like a top. will keep buying amzoil oil until the car dies