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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: levisjohnson on December 30, 2009, 05:45:25 am

Title: oil weight recommendation
Post by: levisjohnson on December 30, 2009, 05:45:25 am

I have looked on the site and searched the internet and can not find what I am looking for.

I would like to know what weight engine oil you would run.
-88 6.2L Diesel 3+3 3/4 ton TH400 all stock

Driving conditions:
-will be daily driver
-drive an hour each way to work on Interstate
-warm humid Florida

I was thinking 10W-40?

Thanks for you help everyone.

Title: Re: oil weight recommendation
Post by: VileZambonie on December 30, 2009, 08:05:08 am

GM recommends 15w40

Title: Re: oil weight recommendation
Post by: levisjohnson on December 30, 2009, 08:21:01 am

I knew a minimum of 10 but I was not sure.  Thanks Vile!

Title: Re: oil weight recommendation
Post by: malibu795 on January 01, 2010, 03:06:55 pm

15w40 is norm for diesel applications

Title: Re: oil weight recommendation
Post by: frito-bandito on February 04, 2010, 07:54:02 am

If your in a bind, 10w40 will work, but its way better to pay the extra $$ and get 15w40

Title: Re: oil weight recommendation
Post by: levisjohnson on February 04, 2010, 06:21:29 pm

I really don't know why I asked.  I grew up on af arm and we had several diesel farm trucks.  I guess it just slipped my mind.