Delo 400 15W40 in a 4.7 Chrysler.

Messages
2,513
Location
Richmond, VA
Now that the weather is getting hot I was thinking about using 15W-40 Delo 400 for my next oil change. This engine supposedly is sludge prone (www.allpar.com) and I was going to use this oil only in the summer months to help prevent sludge. Good idea? BTW the manual calls for 5W-30. I can't think of any possible harm a 15W-40 can do when the weather is hot. [Cheers!] Thanks in advance for the help! [Cheers!]
 
Messages
2,794
Location
NM
Go for it! The consensus here is that Jeeps like a 40W anyway. Delo, Long-Life and Schaeffer's should work well in that 4.0L
 
Messages
4,652
Location
The Garden State
Isn't that 4.7L their newer V-8 motor, not the "old" style 4.0L L-6 that really does like a XX-40. As such is a 15W-40 really benefical or would the engine be better served with a XX-30. Just a thought [Smile] . Whimsey
 
Messages
105
Location
College Station, Texas
Seems that somewhere on here I remember reading several opinions that Delo 15w-40 was good to go year round even in winter, except for extreme low temps. I could be wrong, though. As for the 40wt part, I plan on running 15w40 in my 99 Suburban 5.7L, which calls for a 5w30, as soon as I exhaust my supply of Delo 10w30 which I ordered from the Chevron distributor last year. The Chevy manual specifically states "don't ever use 20w50", so there is a part of me which has a modicum of apprehension when moving up to a 15.6 cSt 40wt like Delo. [ May 22, 2004, 12:03 PM: Message edited by: cheeks ]
 
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