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Castrol GTX MAGNATEC 5W-30 Full Synthetic Motor Oil, 5 Quart, $16.97 $16.97

$16.97
+28 Deal Score
18,169 Views
$19.96 minus 15% S&S for $16.97.

There have been better deals at low as $13 but this is not too shabby for a non-rebate price.

This is for 5w30 and 5w20. 0w20 is more expensive.

https://www.amazon.com/dp/B00TS9Z...UTF8&psc=1
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Castrol GTX MAGNATEC 5W-30 Full Synthetic Motor Oil, 5 Quart, $16.97 $16.97
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Score +28
18,169 Views
$16.97
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Model: Castrol 03057 GTX MAGNATEC 5W-30 Full Synthetic Motor Oil, Green, 5 Quart

Deal History 

Sort: Most Recent
Post Date Sold By Sale Price Activity
09/28/18Amazon$16 popular
42
11/30/17Amazon$15
2

Current Prices

Sort: Lowest to Highest | Last Updated 7/12/2025, 11:40 AM
Sold By Sale Price
Amazon$37.56
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Joined Sep 2020
L10：Finder
> bubble2 172 Posts
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wowmoko
12-01-2020 at 11:41 PM.
12-01-2020 at 11:41 PM.
product is fine but check the prices for the single vs 3 pack... not sure why, but they are charging a lot more for the 3 pack... they tricked me on my last order (yes, that is on me) so just fyi so others don't make the same mistake
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Joined Mar 2008
L7: Teacher
> bubble2 2,520 Posts
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dud
12-02-2020 at 04:02 AM.
12-02-2020 at 04:02 AM.
Where are the better deals as low as $13 for 5W-30???
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Joined Mar 2018
L5: Journeyman
> bubble2 521 Posts
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Original Poster
JonnyAbs
12-02-2020 at 05:20 AM.
12-02-2020 at 05:20 AM.
Quote from dud :
Where are the better deals as low as $13 for 5W-30???

I posted this on prime day. $13. It was a 1 or 2 day thing that was another $4 coupon on top of this and no longer available.

https://slickdeals.net/share/android_app/fp/596849
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Joined Feb 2019
L3: Novice
> bubble2 141 Posts
30 Reputation
papichino30
12-02-2020 at 11:11 AM.
12-02-2020 at 11:11 AM.
Quote from dud :
Where are the better deals as low as $13 for 5W-30???
Regularly check Walmart online. I've scored Quaker State for $13 before. They also have the in store brand Super tech for $14 everyday low price if you can't find a sale
Reply
Joined Nov 2016
L4: Apprentice
> bubble2 372 Posts
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sabrosolopez
12-02-2020 at 11:24 AM.
12-02-2020 at 11:24 AM.
Same price at Walmart
Reply
Joined Mar 2018
L5: Journeyman
> bubble2 521 Posts
618 Reputation
Original Poster
JonnyAbs
12-02-2020 at 11:28 AM.
12-02-2020 at 11:28 AM.
Quote from sabrosolopez :
Same price at Walmart
no, its 19.97 at walmart. The 15% S&S makes amazon cheaper
Reply
Joined Nov 2008
L7: Teacher
> bubble2 2,593 Posts
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Gompei
12-02-2020 at 11:41 AM.
12-02-2020 at 11:41 AM.
I use this for my 2007 Rav4 V6, good oil
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Joined Feb 2014
L7: Teacher
> bubble2 2,249 Posts
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elefante72
12-02-2020 at 02:58 PM.
12-02-2020 at 02:58 PM.
Hate to say but this is no deal at all. If you are going to drop more than 15 bucks it should be on pennzoil. Most other ones are no better than your everyday super tech which is really good oil. Also I work with a lot of engine mechanics and they say you should keep with the same oil package if possible. While I'm not as picky as they are there are a number of subtle differences to how wear and varnish affect certain engines especially turbo and gdi. So ymmv but I have always been told pick an oil and stick with it. I think for the normal driver it doesn't matter tho.
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Joined Sep 2010
L6: Expert
> bubble2 1,209 Posts
422 Reputation
printer88
12-02-2020 at 03:45 PM.
12-02-2020 at 03:45 PM.
Quote from elefante72 :
Hate to say but this is no deal at all. If you are going to drop more than 15 bucks it should be on pennzoil. Most other ones are no better than your everyday super tech which is really good oil. Also I work with a lot of engine mechanics and they say you should keep with the same oil package if possible. While I'm not as picky as they are there are a number of subtle differences to how wear and varnish affect certain engines especially turbo and gdi. So ymmv but I have always been told pick an oil and stick with it. I think for the normal driver it doesn't matter tho.

What makes pennzoil better?
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Joined Nov 2009
L7: Teacher
> bubble2 2,865 Posts
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cobra11murderer
12-02-2020 at 03:56 PM.
12-02-2020 at 03:56 PM.
Quote from elefante72 :
Hate to say but this is no deal at all. If you are going to drop more than 15 bucks it should be on pennzoil. Most other ones are no better than your everyday super tech which is really good oil. Also I work with a lot of engine mechanics and they say you should keep with the same oil package if possible. While I'm not as picky as they are there are a number of subtle differences to how wear and varnish affect certain engines especially turbo and gdi. So ymmv but I have always been told pick an oil and stick with it. I think for the normal driver it doesn't matter tho.

Honestly I've found on my truck it likes castro more.. just at start up.. I stick too full synthetic high mileage on mine but for example I've used Amazon's and it seemed like it clattered more from dead startup vs this where it was non existent. Of course I put enough in and all but still old engine high miles for sure so it could be picky in what it likes.
1
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Joined Nov 2005
L5: Journeyman
> bubble2 765 Posts
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Archimedes001
12-02-2020 at 04:52 PM.

Our community has rated this post as helpful. If you agree, why not thank Archimedes001

12-02-2020 at 04:52 PM.
Quote from elefante72 :
Hate to say but this is no deal at all. If you are going to drop more than 15 bucks it should be on pennzoil. Most other ones are no better than your everyday super tech which is really good oil. Also I work with a lot of engine mechanics and they say you should keep with the same oil package if possible. While I'm not as picky as they are there are a number of subtle differences to how wear and varnish affect certain engines especially turbo and gdi. So ymmv but I have always been told pick an oil and stick with it. I think for the normal driver it doesn't matter tho.
While I'd agree with you that Pennzoil is better this is actually still a pretty good oil and still better than a supertech, kirkland, or amazon basics because those are literally the cheapest possible engine oil you can buy that still just barely meets dexos1/API SP I mean those are like razor thin passes on those tests because cutting any additive and VM use in there means more profit and lower prices.

As for why a Pennzoil or Castrol EDGE is better, they have larger additive packages because they need to meet higher specs such as ACEA and European OEM specs such as VW or BMW. Those additive packages can be double the treat rate of the skinny supertech stuff.

Castrol Magnatec is in between, not a low end treat rate but not as high as an EDGE. Easiest way to tell is look at the specs they meet. API/dexos1 is basic but big companies such as Castrol, Pennzoil, Valvoline etc. will go out of their way to differentiate their products with some aspect of higher performance. You don't need that when you buy based on lowest bid.
ACEA is better
Mercedes benz, VW, BMW specs are pretty much tops

Fun side info, Magnatec has a cool solid additive that's like a wax so when the engine cools it solidifies on the metal and protects until the engine warms up. Was proven that additive could reduce Sequence IV wear tests consistently so they ran those stop/start wear protection ads.

Ignore specs for Ford, Chrysler, etc. as they are basically
API with slightly higher requirements but not by much.
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Last edited by MrMotorOil December 2, 2020 at 05:14 PM.
Joined May 2009
L3: Novice
> bubble2 238 Posts
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hooked1
12-02-2020 at 07:07 PM.
12-02-2020 at 07:07 PM.
So what's a decent cheap 5-30w to use in my 4-banger Camry with 270,000 miles? I usually get 5 quart Quaker State cheap at WalMart.
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Joined Jan 2019
L2: Beginner
> bubble2 99 Posts
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IronheadWillis
12-02-2020 at 09:00 PM.
12-02-2020 at 09:00 PM.
Is this going to be another 20 page oil discussion? At the end of the day, the differences in all these Full Synthetic oils are so miniscule (like the molecules and additives and yadayadayada), that no one will ever notice the difference, not even your engine. And if you say you can tell what full synthetic someone puts in your car simply by driving it, I have placebo to sell you.

I also know somebody that knows somebody that's a mechanic, my brother-in-law, who's been a mechanic for nearly 40 years. "Whichever name brand full-synthetic is the cheapest, just buy that one. You'll never keep your car long enough for your engine to fail because of what oil you picked. Something else will fail before the oil causes your engine to fail."
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Last edited by IronheadWillis December 2, 2020 at 09:05 PM.
Joined Feb 2008
L4: Apprentice
> bubble2 392 Posts
37 Reputation
05Aucrarsx
12-02-2020 at 09:03 PM.
12-02-2020 at 09:03 PM.
Quote from IronheadWillis :
Is this going to be another 20 page oil discussion? At the end of the day, the differences in all these Full Synthetic oils are so miniscule (like the molecules and additives and yadayadayada), that no one will ever notice the difference, not even your engine. And if you say you can tell what full synthetic someone puts in your car simply by driving it, I have placebo to sell you.

I also know somebody that knows somebody that's a mechanic, my brother-in-law, who's been a mechanic for nearly 40 years. "Whichever name brand full-synthetic is the cheapest, just buy that one. You'll never keep your car long enough for your engine to fail because of what oil you picked. Something else will fail before the oil causes your engine to fail."
finally someone with common sense
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