From everything I've tried to research here the general opinion is that the Kirkland synthetic oils are the same as the regular Supertech synthetic 10,000 mile oils. I was to just curious why there is no mileage recommendation. It just seem like every oil now except for maybe Valvoline mentions mileage.
Why doesn't Kirkland synthetic oil put a mileage rating on it?
- Thread starter Corollaman
- Start date
I don’t think the mileage claims mean much, but I think you could expect the same performance from Kirkland as Supertech, or Amazon Basics. They all come from the same place, probably are the same, and all solid choices for the motorist who has an eye on economy.
While I am here, for no cost, I will tell you that a 5k oil change for most dailies is the sweet spot.
edyvw
$50 site donor 2025
And if you read the fine print, ALL those blenders will warn you to respect manufacturer-recommended OCI!
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Fram oil doesn't disclose mileage on their labels or site either.
exactly, I view most of those mileage claims as Pure marketing wank.
Costco probably wants to be a little more on the up and up and not make mileage claims. They know it will work fantastic at the manufacturer recommended changes if it meets their spec.
Although I have not investigated the specs on Amazon basics, I have checked super tech, super tech high mileage, and Kirkland, and they all meet some of the latest stringent specs for oil. Given the short OCI’s that I run, I’ve decided to forgo my beloved Castrol and after I’m finished with my last 5 L jug of Kirkland, I’m going to transition to super tech high mileage 5W-30 for the Honda CRV and 10W-30 high mileage for the LeSabre. At $28 Canadian, which is the normal retail price at Walmart, these oils Are a fantastic buy and are still less expensive than Penzoil platinum or Castrol edge even when they are on promotion stacked with rebates.
I have thought about this strategy (in ON, Canada). I can get 5-quarts (4.73 l) of Kirkland 5w30 for $20 on sale vs 5 liter of SuperTech (AKA Super Tech) for $29 everyday. SuperTech offers 5w40 and High Milage variants but rarely, if ever, goes on sale.
Costco should carry a 5w30 High Mileage. Just sayin'...
Makes sense. Time and time again we see around here that these are great oils.
I thought so too, but at least in my region, they do not offer any high mileage variants.
Only way to tell how long ANY oil is going to last in your car is by doing UOA. Doesn't matter what is written on the bottle. Thats marketing, not real world. Every car, driver and useage situation is different. People dumping Supertech 20K oil in their fuel dilution monster and driving 2 years to get to 20K, probably have a mess......
My .03
My .03
Space is limited. I assume Costco doesn’t want to add more choices being the markup on oil is low compared to higher profit items where general merchandise is sold.
Better question: why do some oil makers put a mileage recommendation on the bottle when they cannot possibly know your vehicle, duty cycle, or oil capacity?
I’m usually not one to harp on marketing but I think those mileage claims are pure marketing. What’s the purpose in putting the rated mileage on the bottle if it’s followed by an asterisk and fine print saying always refer to the manufacturer’s recommendations.
Patman
Staff member
The mileage rating they use is very likely to be a best case scenario situation. But it’s a good way to compare the different oils available from a manufacturer. If you own an engine that is hard on the oil then choose the oil with the highest mileage rating just to be safe.
Not many people here (or anywhere) are going to do 20k intervals but it’s nice to know that the oil you’re using has that ability to go longer than other oils. It’s a great comparison tool (sort of like when you compare tread wear warranties from one tire to the next)
4WD
$50 site donor 2025
Yeah, I see the opposite of “marketing experts” here - Takes intestinal fortitude to carry an EP line amongst the others …
4WD
$50 site donor 2025
Here is the original question folks - the answer is it barely makes the cut to be called “synthetic” in the USA and will oxidize if pushed too far … Costco won’t own that …
I have been to Costco. All the soccer mom's and retirees drive new cars. I have the oldest car in the Costco parking lot.
If I see any other old cars I assume its one of us buying Kirkland.
4WD
$50 site donor 2025
Yeah, all BMW, Yukon Denali, or MB at our store …
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