using different Motor Oil than whats spec'd?
July 22nd, 2009, 8:48 AM
#1
CF Junior Member
Thread Starter
Join Date: Jan 2006
Location: CT
Posts: 51
Likes: 0
Received 0 Likes
on
0 Posts
using different Motor Oil than whats spec'd?
I have been using 10W-30 Castrol GTX in my 94 suburban from day one. I don't believe that it is even spec'd for that oil weight. Regardless, it has 174k on it and runs amazing. I now have a used 01 suburban with a 5.3L and was thinking of using the same oil. What weight are you guys using? Is it more crucial to use spec'd oil weights with the newer gen engines, or is it really not a big deal?
July 22nd, 2009, 10:10 AM
#2
wow
man has this topic been talked to death.
the best advice ever: Read the manual.
I'm not being smart. These people took a lot of time and money to build you an engine... they know what it needs.
https://chevroletforum.com/forum/sho...ghlight=weight
the best advice ever: Read the manual.
I'm not being smart. These people took a lot of time and money to build you an engine... they know what it needs.
https://chevroletforum.com/forum/sho...ghlight=weight
July 23rd, 2009, 7:58 PM
#5
CF Junior Member
Join Date: Jul 2009
Posts: 63
Likes: 0
Received 0 Likes
on
0 Posts
The thicker oil will cut down on your gas mileage a tad, but not enough to notice. other then that, its not going to hurt you or do you any good either. Personally, I would just stick with the 5w30. There is no need to run heavier weights on the newer trucks
Thread
Thread Starter
Forum
Replies
Last Post
samsmcss
Monte Carlo & Lumina
7
March 16th, 2013 8:53 AM
tat2dup81
Silverado & Fullsize Pick-ups
4
November 7th, 2009 9:38 PM
jeremy u
OLD - PRIVATE For Sale / Trade Classifieds
0
January 21st, 2008 8:52 PM
