here comes the oil question...
Senior User
Joined: May 2004
Posts: 109
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From: Alabama
Originally Posted by mrcobra350
I recently switched from Rotella 15W40 to the Rotella 5W40 Synthetic it starts easier and runs smoother on cold starts.
Senior User
Joined: Jul 2004
Posts: 285
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From: north louisiana
Ditto. Switched to Rotella syn.5w-40 at 30,000. My 03 starts very fast, cold or hot, and I have noticed it warms up faster,seems quieter, especially when it is around 32 degrees. It will idle low speed for a few minutes, then it will automatically bump up to about 1000 rpm until I touch the brake, then it idles back down again. Seems like it takes longer with the old dino oil. Just seat of the pants observation, I'm not switching back to do the comparo
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Joined: Jan 2006
Posts: 11
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From: Phoenix, AZ
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Joined: Aug 2004
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I have used Delvac and Mobil Truck/Suv. I recently switched to Rotella 5w-40 synth. because Walmart stopped stocking Truck/Suv for a while. They finally got some in but it was to late, I needed an oil change. I will probably stick with Rotella since it is easier to get here. I have not seen any differences in them. Both seemed to work great. I use Mobil for everything other vehicle.
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Posting Guru
Joined: Jan 2005
Posts: 1,353
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From: Nothern Indiana
Originally Posted by slowmans
what type of oil does everyone use?, i know amsoil is a sore subject but does anyne use it?how about royal purple?
I really don't think it matters what brand you use as long as its changed per the owners manual.
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Joined: Jan 2006
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From: SOMERSET,OHIO
Originally Posted by guydiver12
Yes. There is a Penzoil 15w-40 CI-4 oil. I used it before changing to synthetic. I liked it fine, except for cold weather, it was really loud when starting the motor.
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Joined: Feb 2006
Posts: 5
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i have used delo 400 15/40 in all diesel motors ive driven in past several years. i believe its a good oil as shell rotella is.firesoutmatt is correct in sayin change the oil on a regular basis evry 5000 and should be no problems