Oil
Safety Car
Joined: Dec 2012
Posts: 3,799
Likes: 1,821
From: St. Louis Metro East IL
Internet search is your friend. Search for "Mobil 1 0W40." ESP is listed as Dexos Gen 2 and Supercar is Dexos R. Both flavors are OK. Some auto parts stores carry one or the other locally.
Ron
Ron
Tech Contributor
Joined: Oct 1999
Posts: 40,982
Likes: 9,735
From: Charlotte, NC (formerly Endicott, NY)
Instructor
Joined: Dec 2016
Posts: 152
Likes: 42
From: Upstate NY
I had been getting mine from Speedway motors. 12 qts and a filter as a package.
Since then I've been using 15-50. I do very few street miles and when I do I wait till the oil temp is 150+ before I let it see any real RPM or load.
I tend to change it after every 2 or 3 events and the heavier oil is less than half the cost.
Since then I've been using 15-50. I do very few street miles and when I do I wait till the oil temp is 150+ before I let it see any real RPM or load.
I tend to change it after every 2 or 3 events and the heavier oil is less than half the cost.
Le Mans Master
Joined: Jun 2019
Posts: 5,223
Likes: 2,017
From: Loveland
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Melting Slicks
Joined: Sep 2021
Posts: 2,546
Likes: 1,207
From: Temple Texas
I don't quite understand what you're saying Pshoe. You're using 50 weight because it was recommended in the past or because your oil temps run 270-280 range? If it's the temps, what benefit does a 50 weight oil provide that the 40 weight would not?
Instructor
Joined: Dec 2016
Posts: 152
Likes: 42
From: Upstate NY
Here is an article explaining the generally accepted guidelines for oil viscosity.
K1 is a manufacture of cranks and connecting rods for reference.
Bearing Clearance And Oil Viscosity Explained | K1 Technologies
0w40 is kind of the sweet spot for the LT1/4 all around.
And I have used it. The 15w50 was recommended by GM for track use prior to 0w40 being available.
The economics are 54$ for 10 qts of 15w50 vs 110$ for 10 qts of supercar 0w40.
With the frequency I change fluids it adds up.
When I do occasionally drive on the street it's important to get the oil fully warmed up before giving it a go.
I'm not advocating anyone do this. It's what I do.
44,000 miles and counting.
Hope that helps
K1 is a manufacture of cranks and connecting rods for reference.
Bearing Clearance And Oil Viscosity Explained | K1 Technologies
0w40 is kind of the sweet spot for the LT1/4 all around.
And I have used it. The 15w50 was recommended by GM for track use prior to 0w40 being available.
The economics are 54$ for 10 qts of 15w50 vs 110$ for 10 qts of supercar 0w40.
With the frequency I change fluids it adds up.
When I do occasionally drive on the street it's important to get the oil fully warmed up before giving it a go.
I'm not advocating anyone do this. It's what I do.
44,000 miles and counting.
Hope that helps
Race Director
Joined: Nov 2004
Posts: 14,135
Likes: 142
From: Central Il
Le Mans Master
Joined: Jun 2019
Posts: 5,223
Likes: 2,017
From: Loveland
The recommendation is for all years. GM changed the recommendation. They recommend 0W-40 Mobil 1. They started recommending ESP oil but Mobil upgraded the ESP oil to Supercar oil. Now you can get 0W-40 Supercar oil.
Last edited by kodpkd; Nov 22, 2024 at 04:12 PM.
Drifting
Joined: Dec 2019
Posts: 1,783
Likes: 603
From: Blacksburg Va
I order from Summit. BTW the Supercar oil is available in 5-50 also if you want to go kind of halfway to 15-25. You still get the 5W for cold starts and also get all the 'Supercar' attributes which I don't think the 15-50 has. Summit shipping is free if you spend >$100 so I grab filters or cans of brake cleaner to bump my order if needed.
