Need the oil experts help..
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Posting Guru
Joined: Nov 2007
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From: Tupelo,Ms
Need the oil experts help..
i was looking at the parts house the other day and i was wondering if just reguler old 40 weight would go fine in this 7.3, i'm currently running delo 400 15w40 but its the new low emmission stuff. i didn't notice delo 40 weight having the cj 7 rating. so whats the differnece between the 2? would it hurt to run it?
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
I wouldn't do it. You'd lose all the benefits of it being 15 weight oil at start-up. In other words, when cold, it will be REALLY thick. Very tough for the LPOP & HPOP to move easily.
On a side note, I didn't really care for how Delo ran in my truck. Romped a little when cold, and noisy. My truck REALLY likes 5W-40 Syn Rotella.
On a side note, I didn't really care for how Delo ran in my truck. Romped a little when cold, and noisy. My truck REALLY likes 5W-40 Syn Rotella.
Posting Guru
Joined: Jul 2006
Posts: 1,720
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the 40W will be slow cranking and hard starts when cold. I switched from Rotella to full synthetic Rotella and major improvement. I would not run straight 40w in my 7.3 unless I lived where temps never went below 80 F.
Cargo Master
Joined: Jun 2003
Posts: 3,292
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From: Ardenvoir, Washington
i was looking at the parts house the other day and i was wondering if just reguler old 40 weight would go fine in this 7.3, i'm currently running delo 400 15w40 but its the new low emmission stuff. i didn't notice delo 40 weight having the cj 7 rating. so whats the differnece between the 2? would it hurt to run it?
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