Oil Weight?
Thread Starter
Racer
Joined: Feb 2005
Posts: 318
Likes: 0
From: Kansas City Missouri
Oil Weight?
It's time for an oil change and the weather is getting colder up in the Ozarks. What weight should I go with in the winter? Also, what should I be running in warmer weather? I tried doing a search, but couldn't find anything except for a long, rambling post and was too lazy to ready the whole thing.
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
Actually, Mobil 1 5W-30 is the preferred oil for year-round use, virtually anywhere in the US. 10W-30 is essentially, obsolete and offers no more protection during higher ambient temperatures than does 5W-30 Mobile 1.
5W-30 does circulate through your engine faster at startup than does 10W-30, even when the ambient temp is 70F.
0W-40 Mobil 1 is another good choice, but this may not be as widely available as good ol' 5W-30.
5W-30 does circulate through your engine faster at startup than does 10W-30, even when the ambient temp is 70F.
0W-40 Mobil 1 is another good choice, but this may not be as widely available as good ol' 5W-30.
Administrator
Joined: Mar 2001
Posts: 368,340
Likes: 24,779
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 '26
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
I'm not all that far from where you live and I run 5W30 year around in mine. 
Race Director
Joined: Jul 2004
Posts: 16,795
Likes: 62
From: Lake Havasu City, AZ
Pick an oil that is from a brand you trust, that meets the specs for your car (GM4718M) in the recommended grade 5W30.
Pennzoil Platinum
Quaker State Horsepower
Mobil 1
are 3 readily available at reasonable prices.
IF you are changing your oil like many of us in the 3-5K mile range, you don't need and won't benefit from anything more exotic.
Pennzoil Platinum
Quaker State Horsepower
Mobil 1
are 3 readily available at reasonable prices.
IF you are changing your oil like many of us in the 3-5K mile range, you don't need and won't benefit from anything more exotic.
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
Works for me.
Burning Brakes
Joined: Feb 2007
Posts: 1,149
Likes: 5
From: Grafton WI
Actually, Mobil 1 5W-30 is the preferred oil for year-round use, virtually anywhere in the US. 10W-30 is essentially, obsolete and offers no more protection during higher ambient temperatures than does 5W-30 Mobile 1.
5W-30 does circulate through your engine faster at startup than does 10W-30, even when the ambient temp is 70F.
0W-40 Mobil 1 is another good choice, but this may not be as widely available as good ol' 5W-30.
5W-30 does circulate through your engine faster at startup than does 10W-30, even when the ambient temp is 70F.
0W-40 Mobil 1 is another good choice, but this may not be as widely available as good ol' 5W-30.
Burning Brakes
Joined: Aug 2006
Posts: 1,217
Likes: 5
From: Stark County Ohio
First you should use oil meeting gm spec 4718M (GM-4718M)
Check out this web site
http://www.motor-oil-engineers.com/
Download the Handbook (Can be saved to your computer after download for periodical review as you wish).
Download Motor Oils and Engine Lubrication; A Comprehensive Practical and Technical Handbook
P.S. Here's another web site
http://www.bobtheoilguy.com/
Check out this web site
http://www.motor-oil-engineers.com/
Download the Handbook (Can be saved to your computer after download for periodical review as you wish).
Download Motor Oils and Engine Lubrication; A Comprehensive Practical and Technical Handbook
P.S. Here's another web site
http://www.bobtheoilguy.com/
Last edited by timemender; Oct 23, 2007 at 12:34 PM.
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
See:
http://www.mobiloil.com/USA-English/...l_1_0W-40.aspx
and the data sheet link for more info. I'm fairly certain that Porsche uses it as factory fill for the Boxsters. The Mobile 1 tech help person to whom I spoke, uses this oil in his vehicle (in Texas), so I thnk you are fairly safe if using it in an LS1 or LS6.