costco
Drifting
Joined: Sep 2017
Posts: 1,958
Likes: 688
From: Avon Lake OH
My my wife and I are members at both Costco and BJ's. My local BJ's still sells Mobil 1 and I just bought some 6-packs of quart bottles for $31.49 (sale price). My local Wal-Mart has Mobil 1 in 5-quart jugs for $27.99 or $29.99
Administrator
Joined: Mar 2001
Posts: 367,781
Likes: 24,683
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '25
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
Drifting
Joined: Sep 2017
Posts: 1,958
Likes: 688
From: Avon Lake OH
https://www.warrenoil.com/
Personally, with a stock short block, I would not use an oil unless it is GM Dexos 1 Gen 3 licensed.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Melting Slicks
Joined: Dec 2000
Posts: 3,280
Likes: 1,097
From: Pittsburgh PA
No, I am pretty sure its blended and bottled by Warren Oil Co.
https://www.warrenoil.com/
Personally, with a stock short block, I would not use an oil unless it is GM Dexos 1 Gen 3 licensed.
https://www.warrenoil.com/
Personally, with a stock short block, I would not use an oil unless it is GM Dexos 1 Gen 3 licensed.
Intermediate
Joined: Nov 2004
Posts: 49
Likes: 3
From: Rockwall TX
Pro
Joined: Jan 2001
Posts: 628
Likes: 330
From: San Jose CA
No, I am pretty sure its blended and bottled by Warren Oil Co.
https://www.warrenoil.com/
Personally, with a stock short block, I would not use an oil unless it is GM Dexos 1 Gen 3 licensed.
https://www.warrenoil.com/
Personally, with a stock short block, I would not use an oil unless it is GM Dexos 1 Gen 3 licensed.
Dexos is a marketing term GM uses to get licensing fees out of oil companies, it has no really engineering behind it.
Safety Car
Joined: Jul 2010
Posts: 3,929
Likes: 386
From: Chandler AZ
Wal Mart’s Supertech brand oil full synthetic is Dexos certified.
It’s about $17.99 for 5 qt jug of 5W30 full synthetic, used it in mother in laws car with Supertech oil filter, Mobile one full synthetic 5W30 5 qt jug is $27.99 at Walmart,Mobile One oil filter is around $12.00.
Have thought of using the Supertech full synthetic in my C5 but just pay the extra for piece of mind.
Actually thinking of switching to Valvoline restore and protect $29.99 5 qt jug at Walmart on C5, no sludge but it sounds like it’s better oil.
It’s about $17.99 for 5 qt jug of 5W30 full synthetic, used it in mother in laws car with Supertech oil filter, Mobile one full synthetic 5W30 5 qt jug is $27.99 at Walmart,Mobile One oil filter is around $12.00.
Have thought of using the Supertech full synthetic in my C5 but just pay the extra for piece of mind.
Actually thinking of switching to Valvoline restore and protect $29.99 5 qt jug at Walmart on C5, no sludge but it sounds like it’s better oil.
No Hostility Be Happy
Joined: Aug 2018
Posts: 10,021
Likes: 7,326
From: South Hill Wa
2022 C5 of the Year Finalist - Modified
2021 C5 of the Year Finalist - Modified
After the last costco Mobil 1 betrayal I have since switched all my cars BACK to Castrol Edge.
Not because it is the super duperist oil ever made, but because you can get it ANYWHERE with no bullshit.
Not because it is the super duperist oil ever made, but because you can get it ANYWHERE with no bullshit.
Burning Brakes
Joined: Feb 2022
Posts: 883
Likes: 971
From: NW Burbs of Chi-Town
2025 C5 of the Year Finalist - Modified
The Kirkland/Costco oil is made by Warren oil. It is good oil that I used for many years. However they got bought by the Pritzker family (Hyatt hotels) PE group in 2020 and for that reason alone I will never buy that oil again.
Post 2020, I started using NAPA synthetic made by Ashland/Valvoline. Last year I bought 100 quarts of the Valvoline, Restore and Protect (0-20 and 5-30). We own four cars and I maintain several others. I use a lot of oil. I got the 100 quarts in the form of "Bay Boxes" with handy spigot for $3.85 a quart last year. Nothing wrong with Wally World oil either.
Use whatever oil you want, just change it!
Post 2020, I started using NAPA synthetic made by Ashland/Valvoline. Last year I bought 100 quarts of the Valvoline, Restore and Protect (0-20 and 5-30). We own four cars and I maintain several others. I use a lot of oil. I got the 100 quarts in the form of "Bay Boxes" with handy spigot for $3.85 a quart last year. Nothing wrong with Wally World oil either.
Use whatever oil you want, just change it!
Melting Slicks
Joined: Mar 2023
Posts: 2,898
Likes: 1,659
From: North Coast
I get the oil either at Walmart or if I use Supercar I get it at work.
I use the 15W50 Mobil One in the 911. Walmart is the best price on it. That is good as it takes 12 quarts.
If I can afford a Corvette I can afford Mobil One,
I use the 15W50 Mobil One in the 911. Walmart is the best price on it. That is good as it takes 12 quarts.
If I can afford a Corvette I can afford Mobil One,
Le Mans Master
Joined: Jan 2002
Posts: 5,073
Likes: 1,002
From: Fort Worth TX
St. Jude Donor '15
