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Super Tech 5w30 full synthetic high mileage oil 5qt $14.37

$14.37
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Bought a few, 14.37 seems pretty low for 5 quarts of full synthetic. It says high mileage but its just extra additives

https://www.walmart.com/ip/Super-.../839552658 - now $14.88
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$14.37

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Joined Jan 2006
L3: Novice
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#16
Quote from sportbikerider78
:
Do you guys know who makes Supertech oil? I know their oil filters are made by Purolator. Which is a great brand.
Warren Oil makes supertech, same company that makes amazon's branded oil
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Joined Aug 2012
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#17
Quote from sirDavid
:
But synthetic lasts way longer than conventional. Cost per month is probably lower than conventional.
This is a VERY dangerous myth. Modern cars may now require synthetic oil. My Mazda does according to the owner manual. And still recommend changing every 5000 miles in NJ.
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Joined Feb 2014
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#18
Quote from Hyrax
:
This is a VERY dangerous myth. Modern cars may now require synthetic oil. My Mazda does according to the owner manual. And still recommend changing every 5000 miles in NJ.
It is most likely "recommended" rather "required".

I agree that synthetic is superior to regular oil but changing regular oil at 3k mi or synthetic at 5k mi is just dumb and create more pollution.

How many cars out there used regular oil and passed $150k mi without oil related engine issues? Very many.
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Joined Jun 2013
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#19
Quote from godaime
:
Do you use the same brand or just go with whatever's on sale?
Whatever quality synthetic oil is on sale. I do not have a brand preference.
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Joined Mar 2013
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#20
Quote from hizzledizzle
:
Is it true that you shouldn't switch back and forth between conventional and fill synthetic oil? I've heard once you start using full synthetic you should stick with it.

Sounds the kind of misinformation you'd spread if you wanted to keep people using the expensive stuff, but IDK.
You can mix it 50/50 if it tickles your fancy.
But if you mix 10k mile synthetic oil with 3k dyno you end up with 6500mile oil pretty much.

Yes they do mix without any separation but you're basically diluting the high quality additives they put in synthetics.
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#21
Quote from Hyrax
:
This is a VERY dangerous myth. Modern cars may now require synthetic oil. My Mazda does according to the owner manual. And still recommend changing every 5000 miles in NJ.
Yep. So you go to the dealership and pay them $50 for another synthetic oil change that's likely not even needed yet.
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#22
Quote from luckydog97
:
You can get full synthetic for less than twice the price of standard oil (every day, not even on sale) and it lasts around twice as long and protects better the entire time.

If one is buying oil, they are (presumably) changing it themselves, which means fewer changes, which means that much time and effort saved, which is easily worth the cost difference alone.

Standard oil really doesn't protect all that well, especially after the first 1k miles or so, especially at low temperatures. Most engine wear for most drivers occurs when the engine is cold at startup, and the additives that keep the oil thin at cold temps (and thick at warm temps) in standard oil aren't at high enough concentrations to last an entire oil change, unlike full synthetics which maintain consistent performance through the change interval. Watch youtube videos on the topic. The difference is significant.

Standard oil isn't worth the savings, in many ways. If you have someone change it for you, I recommend having it changed more than every 3k miles if you don't get full synthetic, especially in cold weather, especially on higher mileage vehicles.
I believe science has proven otherwise. Fewer synthetic oil changes < more conventional oil changes.
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Joined Nov 2013
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#23
Quote from ShrewdSeed5557
:
I believe science has proven otherwise. Fewer synthetic oil changes < more conventional oil changes.
Negative. Standard oil additives break down early, and allow excessive wear at startup especially at cold temps.

As long as you use a good filter and don't go over the change intervals, all else equal full synthetic that is properly certified will beat standard oil every time in performance alone, not to mention cost and time savings (if done oneself).
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