Motor oil question

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Mar 6, 2005 | 07:48 AM

killain

Thread Starter

Race Director

Joined: Aug 1999

Posts: 11,113

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From: SE Pennsylvania

St. Jude Donor '03 thru '26

Oldtimer

Motor oil question

What weight oil do we use here, people from Canada down to Texas? Does is vary so much with age or does one oil make sense for all of the north?

PS: my new truck takes 5-20 all year round !

Mar 6, 2005 | 07:52 AM

Aflac

Race Director

Joined: Oct 2002

Posts: 12,065

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From: Smalltownville Michigan

Cruise-In 5, 6 & 10 Veteran

St. Jude Donor '09

I use Valvoline 10W30

Mar 6, 2005 | 08:00 AM

john1977

Instructor

Joined: Jul 2003

Posts: 213

Likes: 1

From: zanesville ohio

10w30 here

Mar 6, 2005 | 08:41 AM

Larry3x2

Instructor

Joined: Oct 2000

Posts: 137

Likes: 0

From: Flemington, nj 08822 usa

Motor Oil Question

It's really a function of engine clearances and lowest starting temperature. Unless you're doing cold starts in northern Alberta, an SAE 10w40 would be my choice. This will accomodate older or engines with larger clearances.

Larry

Mar 6, 2005 | 09:30 AM

marshrat99

Melting Slicks

Joined: Aug 2003

Posts: 2,135

Likes: 2

From: Dayton Oh

Mobil 1 10W40 Syn in my 79. Castrol 10W40 in my Chevy PU. Rotella 5W50 in my wife's Duramax.

Mar 6, 2005 | 09:54 AM

Melting Slicks

Joined: Oct 2000

Posts: 3,023

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From: TEXASTEXASTEXASTEXAS TEXASTEXASTEXASTEXAS

St. Jude Contributor

10W40 Mobil 1 here in central Texas. All four of my vehicles.

JB

Mar 6, 2005 | 10:10 AM

Paul L

Team Owner

Joined: Aug 1999

Posts: 30,995

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From: Ontario

In my daily driver (Impala) in winter I use Mobil 1 0W-30. That is not a typo: 0W-30. It flows at -40F.

In the summer I use Mobil 1 10W-30 in both the Impala and the Corvette. Sometimes I'm tempted to go to 10W-40 but I don't think it is necessary. We did not have one day over 30C (86F) last summer.

Mar 6, 2005 | 11:15 AM

Mako72

Melting Slicks

Joined: May 2004

Posts: 2,733

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From: Gulf of America

2023 C7 of the Year Finalist - Unmodified

2018 C3 of Year Finalist

10W-30 Valvoline in the Vette.
5W-30 in the daily drivers during the winter and switch to 10W-30 during the summer.

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Mar 6, 2005 | 10:49 PM

75 Hot One

Pro

Joined: Mar 2001

Posts: 633

Likes: 1

From: Hamilton, ON, Canada

5-W30 should be fine for Pennsylvania year round for an engine in good condition. Same for southern Canada. I think that's in agreement with the later C3 instruction manuals.

Mar 6, 2005 | 11:11 PM

#10

canucbuck

Instructor

Joined: Dec 2004

Posts: 198

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From: Newmarket Ontario

A poll was done about a month ago on this subject and 10w-30 came in first and 20w-50 came in second and 10w-40 was third.

Mar 6, 2005 | 11:32 PM

#11

StickShiftCorvette

Drifting

Joined: Dec 2004

Posts: 1,345

Likes: 3

I use Castrol 20W50 for my classic V-8 convertibles ('61 Corvette (aluminum 215 CID Buick), '69 350 CID, and '68 Impala 327 CID).

I want maximum lubricity and protection and don't think the milage difference is worth risk of the thinner film thicknesses.

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