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  #1  
Old 05-17-2011, 10:04 PM
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Truck idles 200psi (hpop) lower with delo vs delvac

Ive been running mobil delvac from walmart in my truck and always had above 500 psi at idle about 600-650psi hpop pressure. i just used delo for the first time because they were out of delvac. did the oil change yesterday and noticed now my oil presure sits at 400psi at idle.. does it mater?
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  #2  
Old 05-17-2011, 10:23 PM
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Re: Truck idles 200psi (hpop) lower with delo vs delvac

I don't see how switching oil brands would make a difference in ICP at idle.
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Old 05-17-2011, 11:28 PM
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Re: Truck idles 200psi (hpop) lower with delo vs delvac

I do not like Delo...it has very little detergent in it and turns the inside of your engine black. have torn down many Cummins engines that had delo in them, (big rig engines) and thats what we found, black goo on everything. use Shell Rotella T, Union Guardol, or Mobile 1300 super...these all have a good detergent package, and the crap goes out with the oil change...... you can run that delo forra bit, couple thou miles, then get it outta there. just my opinion ....
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Old 05-17-2011, 11:46 PM
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Re: Truck idles 200psi (hpop) lower with delo vs delvac

yeah im sticking with delvac. i used to use rotella every change but after i switched to delvac i noticed truck idled smother and quieter, less blowby and was thinker at the end of a 4k mile run. now with delo truck idles rougher again, more blowby and now lower hpop pressure..
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Old 05-17-2011, 11:48 PM
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Re: Truck idles 200psi (hpop) lower with delo vs delvac

for the guys who are going to say go with valvoline extreme blue or shaffers or something synthetic, im running dyno for awhile to get a good break in on the new motor. ill switch to synthetic at 50-75k or something
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Old 05-17-2011, 11:56 PM
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Re: Truck idles 200psi (hpop) lower with delo vs delvac

i have used delo since the fourth oil change in my truck! so for about 75,00 miles now.... had the valve covers off a time or two and looks great.... i've tried rotella, delvac, and motorcraft, and delo runs the smoothest in my truck, i change the oil in my truck every 5k in the summer and 3k in the winter cuz of idle times!!!!! i burn the least amount of oil with the delo too..... had amsoil in there too once but i burned way to much of it to keep running it, about a quart per 1k same with rotella syn..... so i guess its more like 60k with delo
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Old 05-17-2011, 11:59 PM
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Re: Truck idles 200psi (hpop) lower with delo vs delvac

Quote:
Originally Posted by madmaxz View Post
for the guys who are going to say go with valvoline extreme blue or shaffers or something synthetic, im running dyno for awhile to get a good break in on the new motor. ill switch to synthetic at 50-75k or something
why so long? why not switch it over after the first oil change?
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Old 05-18-2011, 12:10 AM
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Re: Truck idles 200psi (hpop) lower with delo vs delvac

I'm confused by the claim that DELO doesn't have enough detergent. I've got the OCI reports that show the additive package. Good detergent and great anti-wear additives...Can someone explain?

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Old 05-18-2011, 12:10 AM
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Re: Truck idles 200psi (hpop) lower with delo vs delvac

these engines need to break in atleast 30k with dino is what ive herd from a guys in the powerstroke business
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Old 05-18-2011, 12:15 AM
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Re: Truck idles 200psi (hpop) lower with delo vs delvac

i see. but don't they all come from the stealership with synthetic in it.... or is that just for the new ones.... i thought even back with the 7.3 they came with the semi syn when ford came out with it
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