What oil do you use ?
Thread Starter
Cruising
Joined: Jun 2021
Posts: 14
Likes: 2
From: Georgia
What oil do you use ?
Good morning C5 Owners,
I would like to ask what brand oil you use. I am running Mobil 1 High Mileage 5W-30 in my 1999. I use a WIX oil filter. I was told by a mechanic in my area that a good oil to use is the O'Reilly's High Mileage 5W-30. Any thought ? Thanks.
I would like to ask what brand oil you use. I am running Mobil 1 High Mileage 5W-30 in my 1999. I use a WIX oil filter. I was told by a mechanic in my area that a good oil to use is the O'Reilly's High Mileage 5W-30. Any thought ? Thanks.
Melting Slicks
Joined: Jun 2013
Posts: 3,473
Likes: 691
From: West Virginia
It really does not matter as long aa it is a synthetic. Mobil 1 5-30 (no high mileage or other variants back then) was originally specified for C5's, but the formulation has changed over the years, so it's not the same product as it was back in 1997. I'm currently running Costco's own brand 5-30 synthetic, every bit the equal of the name brands in terms of specification, but much cheaper - no big advertising budget to pay for. They are also my source for Top Tier gas. I also use Wix/NAPA Gold (same thing, even the same numbering system) filters. Never had a problem with them.
Melting Slicks
Joined: May 2013
Posts: 3,030
Likes: 1,439
From: New Jersey
2025 Corvette of the Year Finalist - Unmodified
2024 C2 of the Year Winner - Unmodified
2024 C1 of the Year Finalist - Unmodified
2023 C2 of the Year Finalist - Unmodified
2023 C5 of the Year Winner - Unmodified
St. Jude Donor '25
I used Amsoil 5w30 Signature for my last oil change. Signature Series 5W-30 Synthetic Motor Oil | ASL - AMSOIL
No Hostility Be Happy
Joined: Aug 2018
Posts: 10,082
Likes: 7,398
From: South Hill Wa
2022 C5 of the Year Finalist - Modified
2021 C5 of the Year Finalist - Modified
You can run Walmart Synthetic oil and you will be just fine. It really doesn't matter.
Changing it on a regular basis is far more important than what brand it is.
Currently running Edge 10w30 for no particular reason other than my brain likes it.
Changing it on a regular basis is far more important than what brand it is.
Currently running Edge 10w30 for no particular reason other than my brain likes it.
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,668
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Team Owner
Joined: Sep 2002
Posts: 30,625
Likes: 4,620
From: Bonita Springs, Florida
I usually buy whichever is on sale around $22-$25 for a 5-quart jug (LS2) and have a 6 pack of quarts form Costco usually on sale for under $30 and I use ACDelco filters or Purolator PureOne. I use Mobil One if available otherwise Valvoline or Castrol Edge.
Amsoil oil and filters are great, but I am not paying $16 per quart and $18 per filter for it.
Safety Car
Joined: Jul 2010
Posts: 4,005
Likes: 386
From: Chandler AZ
I have always used Mobile one full synthetic and have used ac Delco or mobile one, purolator filter, first ever oil change used a fram oil filter then heard they were not as good, that was 2003.
Cheaper oil is probably fine but the price of Mobile One oil is usually $10.00 max for oil change vs Walmart super tech brand, $10.00 is not that much $$.
Cheaper oil is probably fine but the price of Mobile One oil is usually $10.00 max for oil change vs Walmart super tech brand, $10.00 is not that much $$.
Le Mans Master
Joined: Feb 2021
Posts: 6,514
Likes: 4,361
From: Florida
2025 Corvette of the Year Finalist - Unmodified
2024 C5 of the Year Winner- Unmodified
2022 C5 of the Year Finalist - Unmodified
Oil is truly oil, but they are definitely not all the same quality. However, that lifelong debate aside, I use Mobile1 5w-30 full synthetic, and
.
Mann+Hummel is a global leading manufacturer of filtration equipment. The company uses state-of-the-art equipment in its facilities worldwide.
—————
Note: Mann+Hummel also owns Purolator, another top quality line of filters.
Where are Wix Filters Made?
Before the merger with Mann+Hummel, Wix oil filters were made in the US. But after the merger, they are now being made outside the US. Wix oil filters are manufactured in Mann+Hummel’s facilities located in the following countries:- China
- Canada
- Poland Brazil
- Mexico
- Ukraine
- Venezuela
Mann+Hummel is a global leading manufacturer of filtration equipment. The company uses state-of-the-art equipment in its facilities worldwide.
—————
Note: Mann+Hummel also owns Purolator, another top quality line of filters.
Burning Brakes
Joined: Jul 2021
Posts: 937
Likes: 175
From: Raleigh Suburbs
^^^^^^^ This is the real truth. I watched a review of filters from a reputable source with comprehensive test, albeit air filters, and Wix provided the best filtration compared to many popular brands.
No Hostility Be Happy
Joined: Aug 2018
Posts: 10,082
Likes: 7,398
From: South Hill Wa
2022 C5 of the Year Finalist - Modified
2021 C5 of the Year Finalist - Modified
This is why I use good ole AC Delco filters so I just know right up front they're made in CHI na. lol
Team Owner
Joined: Sep 2002
Posts: 30,625
Likes: 4,620
From: Bonita Springs, Florida
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,668
Safety Car
Joined: Jul 2010
Posts: 4,005
Likes: 386
From: Chandler AZ
So I’m doing first ever oil change on my gf’s 2018 Kia Soul, she got it new and was getting oil changed at dealer, it was usually $45.00 and included a car wash, last time it was $95.00 and I saw receipt and told her I’ll do it now.
Went to Walmart and was going to use super tech oil, but it was only about $3.50 more for 5 qt jug of mobile one full synthetic $29.99, super tech full synthetic 5 qt was $26.50, out of mobile one oil filters, their filter lookup tool didn’t list K and N oil filters but they sell them, used google and got K & N filter for $10.97.
The super tech oil filter for her car would have been $3.48.
The K & N filter says made in USA on filter body.
Went to Walmart and was going to use super tech oil, but it was only about $3.50 more for 5 qt jug of mobile one full synthetic $29.99, super tech full synthetic 5 qt was $26.50, out of mobile one oil filters, their filter lookup tool didn’t list K and N oil filters but they sell them, used google and got K & N filter for $10.97.
The super tech oil filter for her car would have been $3.48.
The K & N filter says made in USA on filter body.
Drifting
Joined: Sep 2022
Posts: 1,791
Likes: 2,049
From: In the woods
2024 C5of the Year Finalist - Unmodified
It is my understanding that O'Reilly's house brand full synthetic is made by Mobil One. The packaging is even the same color silver, I am sure that means something, lol.