5W-30 OK for 5.7L Hemi??
Joined: Feb 2005
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RE: 5W-30 OK for 5.7L Hemi??
Dodgemech nails it - absolutely correct
for a full discussion see:
http://www.300cforums.com/forums/showthread.php?t=2437
for a full discussion see:
http://www.300cforums.com/forums/showthread.php?t=2437
Rookie
Joined: Dec 2004
Posts: 85
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RE: 5W-30 OK for 5.7L Hemi??
I got my oil changed for free (of course) after I asked them why they used 5w-30. They were very apologetic about it and showed me that their computer shows that the Magnum RT takes 5w-30. After they did some digging and talked with one of their senior mechanics, they realized that it was an error and are updating it to reflect that it should take the 5w-20. I feel better now 
Veteran
Joined: Jul 2004
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RE: 5W-30 OK for 5.7L Hemi??
ORIGINAL: Pentagon Magnum
... showed me that their computer shows that the Magnum RT takes 5w-30.
... showed me that their computer shows that the Magnum RT takes 5w-30.
oil filler cap..... Glad you got it taken care of....
All Star
Joined: Feb 2004
Posts: 788
Likes: 1
RE: 5W-30 OK for 5.7L Hemi??
Not sure what computer they are talking about but the DCX web site that all dealers are required to use for tech information makes it very clear to use 5W-20. Glad you got them straightened out.
Professional
Joined: Jul 2004
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RE: 5W-30 OK for 5.7L Hemi??
I read somewhere that Mobil 1 5w-30 is on the lower side of the viscosity spectrum. That's probably why it works in the RT. But other 5w-30 brands may not.
But the safe bet is to use 5w-20. I don't trust dealers so I do my own oil changes.
MikeyB
But the safe bet is to use 5w-20. I don't trust dealers so I do my own oil changes.
MikeyB
Record Breaker
Joined: Sep 2004
Posts: 1,270
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From: southern NH
RE: 5W-30 OK for 5.7L Hemi??
ORIGINAL: Pentagon Magnum
I got my oil changed for free (of course) after I asked them why they used 5w-30. They were very apologetic about it and showed me that their computer shows that the Magnum RT takes 5w-30. After they did some digging and talked with one of their senior mechanics, they realized that it was an error and are updating it to reflect that it should take the 5w-20. I feel better now
I got my oil changed for free (of course) after I asked them why they used 5w-30. They were very apologetic about it and showed me that their computer shows that the Magnum RT takes 5w-30. After they did some digging and talked with one of their senior mechanics, they realized that it was an error and are updating it to reflect that it should take the 5w-20. I feel better now
All Star
Joined: Feb 2004
Posts: 788
Likes: 1
RE: 5W-30 OK for 5.7L Hemi??
ORIGINAL: TeeWJay426
Probably somebody got their signals crossed or they were just having a bad day. Without the MDS system, the 5W-30 is the recommended oil for the 5.7 Hemi, as in the case of my '03 Ram. Still not a good situation, but I can see how it might happen....... by the way, with the 5W-20 did your engine response smooth out?
ORIGINAL: Pentagon Magnum
I got my oil changed for free (of course) after I asked them why they used 5w-30. They were very apologetic about it and showed me that their computer shows that the Magnum RT takes 5w-30. After they did some digging and talked with one of their senior mechanics, they realized that it was an error and are updating it to reflect that it should take the 5w-20. I feel better now
I got my oil changed for free (of course) after I asked them why they used 5w-30. They were very apologetic about it and showed me that their computer shows that the Magnum RT takes 5w-30. After they did some digging and talked with one of their senior mechanics, they realized that it was an error and are updating it to reflect that it should take the 5w-20. I feel better now
