Best Synthetic Oil

Most experts agree that the main benefit of using synthetic oil is the convenience of longer oil change intervals. While conventional non-synthetic oil is recommended to be changed every 3,000 miles, you can typically go 5,000 7,500+ miles on synthetic without worry. And though synthetic is much more expensive, it's worth the extra cost for drivers that dont want to change their oil as frequently. When shopping for oil, it's hard to go wrong if you use a brand approved by the manufacturer and the correct viscosity. Our picks for the best synthetic oil show consistent performance over long drains.

Pennzoil Platinum Full Synthetic Motor Oil

Pennzoil Platinum may not offer the absolute best performance, but for the money, it's hard to beat. This synthetic oil still performs very well and is much more affordable and easier to find than higher-end synthetics such as AMSOIL, making it the all-around best synthetic oil choice for most consumers. Read Full Review

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    Why it's best:

    Pennzoil Platinum performs well, is easy to find at retail locations, and costs much less than boutique synthetic oils such as Redline or Amsoil. You can pick up a 5 liter jug for around $20 from Walmart, making it an excellent value. Used oil analysis of Pennzoil Platinum consistently shows very good results, even with long oil change intervals. Factoring in a combination of performance, availability and value, this is the best overall synthetic oil for most drivers.

    Pennzoil Platinum Full Synthetic Motor Oil

    AMSOIL 100% Synthetic Motor Oil

    Widely considered to be the best synthetic oil money can buy, AMSOIL would be the #1 choice if it weren't for its high price tag (nearly double that of Pennzoil Platinum) and the fact that it's harder to find unless you're ordering online. AMSOIL synthetic oil can withstand extreme temperatures and holds up very well under extended drain intervals. If you want the best and don't mind paying for it, it's the way to go. Read Full Review

    Why it's best:

    AMSOIL synthetic motor oil is quite expensive nearly double the price of Pennzoil Platinum but offers leading performance and holds up very well over long drains. The Signature Series (SSO), available in 0W30, is particularly known for lasting an extremely long time. If money is no object, this is the best synthetic oil for performance.

    AMSOIL 100% Synthetic Motor Oil

    Castrol Edge with Syntec Technology Full Synthetic Motor Oil

    Castrol's new Edge with SPT synthetic oil provides outstanding performance for the money. This particular oil is more than a simple renaming of Castrol's well-known Syntec - the formula has been tweaked to extract more performance, making this one of the best synthetic oils around today. Read Full Review

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      Why it's best:

      Castrol's synthetic oils are recommended by many manufacturers and mechanics. Formerly known as Castrol Syntec, the new Castrol Edge with SPT (Syntec Power Technology) is one of the best synthetic engine oils for the money. This oil features long drain intervals and excellent protection against metal-on-metal wear, making it a great choice for drivers who rack up miles quickly.

      Castrol Edge with Syntec Technology Full Synthetic Motor Oil

      Mobil 1 Synthetic Oil

      Mobil 1 synthetic oil offers great performance and is readily available in retail stores and online, but typically costs a bit more than Pennzoil Platinum and doesn't offer much to justify the higher cost. Still, it's hard to go wrong with the oil chosen as the factory fill for all Porsche and Mercedes AMG vehicles, the Nissan GT-R, and many other high performance cars. Read Full Review

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        Why it's best:

        When you think of synthetic oil, Mobil 1 is probably the first thing that comes to mind. Mobil 1 is the factory fill of many top-performing cars including the Nissan GT-R, all Porsche vehicles, and Mercedes-Benz AMG vehicles. It's hard to go wrong with Mobil 1, but Pennzoil Platinum performs as well -- if not better -- and is a little cheaper.

        Mobil 1 Synthetic Oil
        Leave a Question or Comment
        • lennyautodoc lennyautodoc

        been using 5/40 mobil 1 turbo diesel oil in everything for years 200k on one car over 300k on two others can go 3 years on an oil change on the lawn mower works great in the HARLEY more power oil runs 10 degrees cooler less friction handles more heat ITS GRRRRRRREAT

        Posted on 5/14/2014 2:42 pm | Reply
        • Houckster Houckster

        None of the above oils are truly synthetic. They are made mostly from Group III petroleum. True synthetic oils don't have petroleum in them.

        Posted on 3/28/2014 11:10 am | Reply
        • pat.treudy pat.treudy

        I've been running Pennzoil Ultra for over 30,000 miles now and my car has never run better.

        Posted on 5/10/2013 7:36 am | Reply
        • pat.treudy pat.treudy

        I've been running Pennzoil Ultra for over 30,000 miles now and my car has never run better.

        Posted on 5/10/2013 7:35 am | Reply
        • david.joyner.988 david.joyner.988

        Where is a list of all oils in this study. How do you list only four and not mention all the others tested. Looks to me they need a larger study. For one that does not have Royal Purple mentioned seems a short study.

        Posted on 10/3/2012 5:55 am | Reply
        • levi.patterson.7 levi.patterson.7

        Anyone using Schaeffer Oil? I have seen a test at a local flea market blowing away every competitor you can imagine! Incredible product! Learn more at I use it in my car 1993 Mitsubishi Eclipse with 194K miles and counting! Have not seen any other oil even compare! Check it out!

        Posted on 9/23/2012 12:49 pm | Reply
        • Dapster Dapster

        I've been using Schaefer oil for 3 years now. BEST DAMN OIL OFF THE MARKET. I run it in my 2010 F350, my 2007 Vermeer Rock Saw and my 2013 Bobcat Excavator. I also use a product called (filter mag)......... those go on the outside of your filters and keeps metal shavings from floating around in the piston chambers. GOOD SHIT !

        Posted on 8/21/2013 5:51 pm. In reply to levi.patterson.7 | Reply
        • North Georgia Synthetics North Georgia Synthetics

        Amsoil has proven itself to me over years of racing. I am a ASE master tech and have been using it for years and my vehicles,boat motors, lawn equipment, the list goes on for the family of high quality products in the synthetic oil catagory,become a satisfied perfered customer and the price is no option, for the best synthetic oil known to man. become a perfered customer and check out my website at North Georgia Synthetics

        Posted on 8/12/2012 6:38 pm | Reply
        • Herb Herb

        For some that don't know, Mobil and others have change their chemisty on their "full syn" oil's. Mobil may say full syn but it's not, it's a hydrocracked grade 3 synthetic oil just like Shell Rotella T6 and others. Due to the high cost of additives these companys cut the additive packages. Still good oil's but can't compare to AMSOIL PAO 100% full synthetics. Other oils are good, but if you want something that's the best Move up to AMSOIL. No other oil comes close and the test data backs it up.Herb LansbergSyntheic Oil SpecialtiesCertified Lubrication SpecialistAMSOIL Direct Jobber

        Posted on 8/7/2012 3:16 pm | Reply
        • TeJay TeJay

        Hi, This is my first post. Taught automotive for 35 years. Also had the opportunity to talk with a 35 years master blender for Valvoline. He swore by synthetics. I've used Mobil 1 for 30 years and have never had a problem. Here's what a local large trucking company (18-wheelers) does. I may not have the information I'm going to tell you exact but it's close. They change filters every 10-K top the oil and run their trucks for 50-K to 100-K and more miles. When they are done with the truck they sell them to Russia. The Russians hook them up to generators and run their factories. Now that's getting some time on engines. By the way Corvette switched to Mobil 1 because they removed the oil cooler to save weight & the oil temp went up. When they switched the temp went back down. ENOUGH SAIDTeJay

        Posted on 5/27/2012 5:35 pm | Reply
        • Liggy Liggy

        This list has been unchanged for quite some time now, and the manufacturer's have updated/improved thier products. I suggest Bestcovery re-do their product analyses and provide a current list of recommended synthetic oils.

        Posted on 4/19/2012 11:58 am | Reply
        • raggtopp raggtopp

        I am just a regular driver. I have had my Toyota GT 1995 for 19 years and 121,000 miles. I have used Ford motor co. oil, 10W30 synthetic blend and changed oil every 3K and the filter ever other time. It runs like a top and burns no oil. Walmart sells it about as cheap as you can buy. Why pay more.

        Posted on 4/12/2012 6:17 pm | Reply
        • oldbill oldbill

        I have used Mobil 1 or other fully synthetic oils in cars, trucks, and motorcycles since 1975. I change oil based on mileage and oil condition, not time. I have never had an oil related failure in an engine I have bought new or rebuilt.

        Posted on 4/8/2012 11:32 am | Reply
        • egor0305 egor0305

        OK, now all I hear is Amsoil! Once again I wonder if there are thoughts on Royal Purple? I think that this web site might just be hooked to Amsoil. Yep Royal is a few cents more, but running with some of my friends who race 25 and 500 miles or more, 97% run the Royal Purple. Wonder why?? In the NASCAR circle none use Amsoil. Wonder why?? Anyone?

        Posted on 4/7/2012 8:14 pm | Reply
        • OilMan OilMan

        egor, The reason people are talking about Amsoil is because they know its the best on the market. Amsoil beat out Royal Purple in all kinds of tests, and your wrong about nobody in NASCAR using Amsoil. AL Unser Racing uses Amsoil and is a personal friend of the founder of Amsoil. He said many cars may have other oils as sponsors but if you go in the garage the containers may say Penzoil or Shell or others but thats not what is in the bottles, its Amsoil. As Unser said," I'm paid to win races and I win with Amsoil" bottom line There are a number of them that use Amsoil. Can you go 25-35,000 miles on Royal Purple with out changing your oil? I do!

        Posted on 4/8/2012 10:16 pm. In reply to egor0305 | Reply
        • OilMan OilMan

        For the best synthetic oil and lubes look to Amsoil, it the best for the value. For a catalog just send me a e-mail at and I'll send you a copy of our e-catalog.

        Posted on 4/5/2012 11:59 pm | Reply
        • egor0305 egor0305

        I have heard all the different oils spoken of but I have heard nothing of Royal Purple. I have used it for the past 10 years and all I can say is it WORKS! I have a Plymouth Voyager with 157,200 and it uses no oil and runs great. I have used it for the past 10 years and also in my Nissan Cube with 30,000 miles. Well speak up guys??

        Posted on 3/26/2012 6:50 pm | Reply
        • wbstephe wbstephe

        This analysis is bogus. The top Tier Mobil and Castrol products were not even tested.Mobil 1 Extended PerformanceCastrol Edge with Titanium Fluid StrengthAnd why would you ever choose a product as the Best based on price? Oil is cheap compared to an engine and engine performance.

        Posted on 2/8/2012 6:29 am | Reply
        • frisbee frisbee

        We used to call Pennzoil, Pissoil, when I lived back in PA and no one in our mechanic group would use it, esp after Arnold Palmer (a real oil expert, for sure LOL!!!) started endorsing the stuff. Personally, I'll stick with the best, Mobil 1, and the company that started the synthetic oil business in the USA in the first place. Good old German technology came up with turning dinosaur oil into synthetic oil and EXXON/Mobil is continuing in that fine tradition. And, I'd like to know what experts "agree that the main benefit of using synthetic oil is the convenience of longer oil change intervals". If that is the main reson, you better look for smarter "expert", given that motors oils are relatively inexpensive. I think if honest research was done the main reason for using a synthetic is for the unrivaled protection against heat damage synthetic oils provide for an engine. I've used Mobil 1 in all my vehicles - foreign and domestic, since 1980 - so, I am expert enough. Mobil 1 is the BEST, else why would Corvette, Viper, BMW, ect., all ship with Mobil 1 in their crankcases? And, as far as pricing for Mobil 1, why would anyone shop at Amazon for motor oil? Walmart has excellent pricing for an excellent product. Way, way less than your near $50 price. SHEESH!

        Posted on 1/7/2012 12:02 pm | Reply
        • OilMan OilMan

        frisbee, yes Pennzoil is crap, but Mobil 1 is not the best oil on the market. Ask yourself why does a company sponsor another companies product? "FOR MONEY, THATS WHY" Mobil 1 is not the first to make synthetics, it was Amsoil, they have made it since 1972 and when they made the claim that they were" The First in Synthetics" nobody spoke up and said anything, if they did then Amsoil couldn't claim being the first. They had the chance to speak up and say no we were but Mobil never said anything. Mobil 1 is not out that many years, do your research and you'll find out. I spoke with the Shell Answer man and he said Amsoil was a great product and it was the best on the market, including anything they made at the time.

        Posted on 4/8/2012 10:27 pm. In reply to frisbee | Reply
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