Product Reviewed: Extended Life 5W-30 Synthetic Motor Oil (XLF)
Current Rating: 4.95 out of 5 stars
Votes & Reviews: 276 vote(s) and 437 user reviews.
Reviewed by Joseph: 
I've just started using this, about 3,000 miles on my 05 Prius and the oil still looks clean. Gas mileage stayed the same.
Reviewed by Joseph:
So far so good!
Reviewed by Brian:
My mechanic brother in law got me hooked on amsoil products from oil to additives... and I'm glad you can tell the difference in just the sound of the engine and the performance no matter what you use ... I'm a believer in amsoil product now.
Reviewed by Michael:
Use in my 96 Avalon and 2001 Lincoln LS.
Love it!
Reviewed by Tom:
Great stuff.
Wouldn't use anything else.
Reviewed by DEREK:
I used this in my daughters 05 Kia Sportage. She is six hours away at college and I can't be there to monitor mileage intervals. With the XL and the assurance that she can go 10k miles between oil changes. I can take care of the maintenance on summer breaks.
Reviewed by Karen:
This summer I decided to do my #1 bucket list trip of a lifetime and I drove cross-country from Connecticut to Oregon/Washington and everywhere in between. I used amsoil for the first time in my 2013 GMC Terrain (new to me in Feb.) and I drove over 8,000 miles in 3 1/2 weeks. I never had to add any oil and my vehicle ran perfect. I was over 10,900' elevations and others many times on the drive out and back and was in temperatures from 50-95 degrees. I am now hooked on using amsoil in my vehicles and thank my boss for recommending it.
Reviewed by snakedoctor:
this is the best there is as a former aviator using synthetics in turbine engines worked great so if its great for aircraft engines then its equally as great fro your vehicle
Reviewed by Gary:
I use AMSOIL in a variety of vehicles I own. I started using the products years ago.
XL 5W-30 Synthetic Motor Oil in a 2011 Subaru Outback.
European SAE5W-40 in a 2001 VW GTI and 2006 Audi A3
Recently
switched to Marine SAE10W30 on my 2016 Yamaha 115HP and 9.9HP
Reviewed by Gene:
I have used XL 5W-30 motor oil in two vehicles for the last six years. Very happy with performance and wear. I would recommend this oil to everyone.
Reviewed by Dodge Man:
I am satisfied with the results so far in using amsoil and how well it holds up to extreme duty driving.
Reviewed by Woody:
I have a turbo charged 4 cylinder Chevy which tends to run hot. I use Amsoil because the science says superior engine protection under high heat conditions. With 136,000 miles in 3.5 years have had no problems. I will keep using Amsoil.
Reviewed by Giger:
I have always used synthetics in my motors and never miss a beat when it comes to maintenance. I recently started racing RallyX with my wife and I have heard great things about Amsoil so I thought we would give it a try. I had no idea what we were missing out on. Basically it took the motors efficiency and turned it up to 11. Just changing to Amsoil from one race we were able to push our 88' Mazda 323 motor into a top 5 finish against cars as new as 2016. I now use Amsoil in all my cars and buy oil by the case.
Reviewed by Snoopy:
I use Amsoil in all my personal vehicles, and the results do add up. I can tell the difference right away. Pleased to be a Amsoil member.
Reviewed by ArvilZZ:
This is the best product on the market
Reviewed by Pappa:
I've used Amsoil products sense the 70's and they never fail to deliver. I have never had a oil related engine problem. Plus when everybody compares themselves to a product then which do you buy?
Reviewed by Caveman:
I use it in two cars and it is the best by far and I will always use it.
Reviewed by Andy:
The best oil I've used in my lifetime!!!!
Reviewed by Spatchola:
I use this Product in my Tracker . Summer or winter is all the same. Amsoil products are supreme in my Books. Pleasure doing Business with them.
Reviewed by olriverman:
use this in my riding tractor and it seems to hold up really well under the heat and I can go longer between changes
Reviewed by JayDubya:
I have been using XL 5W-30 in a Chevy Vortec 8.1 L V8 and in several automobiles for several years. It has kept my engines squeaky clean and running. This is a solid motor oil. I change oil every 6 months which sometimes gets a little over the limit for miles (6k to 8k), but the oil could withstand many more miles it is so strong.
Recently, I serviced a 5.3 L Chevy Vortec that we had no service records for. The engine was not running well and we took it to a dealer who said they would have to replace the oil pump. I knew the oil pump was ok and explained to them that
the oil pressure was going up and down, indicating a bad sender unit, but they wouldn't even try.
I took the vehicle back, drained out half the oil and replaced it with ATF and ran it for several minutes. The oil pressure came back after about a minute and hasn't been any trouble since. I then changed the oil/filter and put in 6 qts of XL 5W-30. It runs like a new engine. The engine had 237,000 miles and my guess is that it had been serviced with some standard brand of oil, which is fine for most engines, but not this brand. It was so chocked full of crud that when I put a good synthetic (not Amsoil, the owner provided the oil) in it, it loosened all the stuff up but couldn't deal with it. The ATF cleaned everything out and the XL 5W-30 cleaned the rest and makes her purr.
I have never found a better oil than this for the price.
Reviewed by Carl:
I use Amsoil 5W30 in my daughter's 2005 Toyota Corolla. Other grades of Amsoil in our other cars. I LOVE the extended drain intervals and quality oul i get with every purchase!
Reviewed by dave:
ford f100 500 000 miles good oil
Reviewed by Paul:
I use Amsoil in all my vehicles-- from a 34 Ford to a new Equinox. Just sold a 97 accord with 300,000 miles on amsoil and engine was still like new. I also convert all to other amsoil fluids early in their life. Never had a failure of any component using amsoil.
Reviewed by Piper:
I have been using all types of Amsoil products in my personal vehicles and swear by its performance. I use this oil currently in my 2009 Colorado and change it every 5-6k miles. I never have to add any during the oil life cycle. At 82k miles it runs extremely quiet and seems to run cooler even on long trips 700+ miles at least two times annually.
Reviewed by Bluemedic:
All I can say is I believe in the Amsoil product and have used Amsoil for 15 years. It's a great product !
Reviewed by Old School:
I use it for the oil change on my 2001 VW Jetta TDI. Since I started using it, I've noticed my engine runs smoother, making less noise. And, together with a couple of other small upgrades to the engine, it also helps me get almost 5 mpg better than what it did before I switched oils in September of 2009. Ams oil is by far the best oil I've ever used on any of my vehicles.
Reviewed by Okie:
I have used this product for the last few years. I think it is superior to regular oils.
Reviewed by Dave:
This oil has never let me down. I always average two miles per gallon better over other leading synthetic oils. Perfect oil for longer intervals and reduces O.C. issues. Great work again AMSoil.
Reviewed by Rick:
This wasn't my first AMSOIL purchase but lost my local dealer so bit the bullet and became a preferred customer. Just wish I was bright enough to buy some extra oil that I will lose when I do the filter change in 5K miles! DUH! Bought a GM Certified 2011 GMC Canyon with 73,000 miles . I did the AMSOIL engine flush as per instructions and NO; the high mileage engine didn't start weeping oil! Let it drain all day to get the last drop of whatever was in there out. Within the first 500 miles, I can say I am getting noticeable increase in fuel efficiency. I haven't done the math because I don't have a reference for the pre-change MPG. I just know that a tank of gas stretches a bit further. What is also noticeable is the engine seems smoother at startup and runs cooler on the road. Not a very technical review but I can say I've been using and will keep on using this product.
Reviewed by stoneman:
I really like Amsoil. To me none finer. When ever you do something where oil is involved you will find it really slippery. I fine the engines run smoother, quieter, and cooler. And I drive long distance at times.
Reviewed by Bills ss:
Use it in My 1999 Camaro SS....And my 1997 LEXUS FOR APPROX. 10 YEARS...189,000 And still going
Reviewed by Mr Cannon:
5-6k mi changes and zero burn/ consumption 140 k miles and strong . Still clear at 5k change.
Reviewed by Tim:
I was introduced to this product (won a case)in the late 70s as a door prizes at a golf tournament.
I got away from it until I bought my 2000 F150 when I worked with sone one who was a representative.
It is the best product. I also put it in my wife's 1992 Toyota.
When I had it (Toyota) torn down the shop couldn't believe how clean it was internally.
I have not had my F150 worked on internally because it is still great with over 247,000 miles.
It is worth the money and effort to use and change your own oil with Amsoil.
Reviewed by Lyle:
I have been running Amsoil XL 5W-30 My 1999 GMC Pickup since 2005 I do 8000 mile oil changes and have not seen a dirty black dipstick since. I use to now when the oil needed changed because it was time to add a quart but it no longer uses that quart every 3000 miles When I changed everything in the pickup to Amsioil the tranny the diffs the engine this pickup went from 16 MPG to 21 MPG. The 2007 Chevy Cobalt has never seen anything but Amsoil Since it's break in oil.
Reviewed by Josh:
Everything about my experience with AMSOIL has been great.
The service was excellent and the product itself is phenomenal, I can't see myself ever changing engine oils again, especially since I can go 16,000 kms on one oil change.
Great product!
Canada
United States
I would never use anything but Amsoil in any of my vehicles
Have used the XL oil every 10,000 miles since the day I purchased my new 06 Focus in late 05 ; and at 265, 00 miles I use virtually no oil between changes ; that's no oil usage in 10,000 miles !!