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Old 04-17-2006, 05:03 AM   #15
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Ray,IN:
Are you aware Mobil 1 is not approved for diesel engines? </div></BLOCKQUOTE>You might want to look HERE. Prior to its reformulation earlier this year, Mobil 1 Truck and SUV carried a CI-4 rating, and Mobil Delvac 1 has been available for many years.

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Old 04-20-2006, 07:23 PM   #16
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Well I'll be dipped! Thanks Rusty, I haven't read the backside of a Mobil 1 can for a while. Yea I've used Delvac. I wouldn't dare use 5-W anything though, most diesel mfgrs don't recommend it unless it's very cold. Like WD40 reformulated and added the word lubricates on their cans after the word got out it was causing gumming and sticking of small metal parts. It was meant to displace water, not lubricate,and something had to stick enough to do that.
UPDATE April 24, I visited china-mart yesterday and read the back label of all weights of Mobil 1, it is still not approved by Cummins,CAT, or any of the major diesel engine manufacturer's. Devlac 1 lists the approval of these manufacturer's, and carries the appropriate code.
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Old 04-21-2006, 11:47 AM   #17
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Valvoline is now distributing ATF+4 a synthetic transmission fluid recommended for Chrysler, Dodge, and Jeep Vehicles.
Kind of pricy, but about half the price as that from a MOPAR Dealer. $3.50/qt at a NAPA Auto Store.
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Old 04-21-2006, 06:06 PM   #18
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Prior to its reformulation earlier this year, Mobil 1 Truck and SUV carried a CI-4 rating, and Mobil Delvac 1 has been available for many years. </div></BLOCKQUOTE>
It is $20.50 for 5 qts at WallMart. I'm using it in my PowerStroke
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Old 05-10-2006, 04:47 AM   #19
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I think that many are aware that the Mobil 1 Truck & SUV has changed. It USED to be 5W40 and rated for diesel service; it has been changed to 5W30 and only for gassers now. Pretty confusing if you're not paying attention. It is to be replaced with Mobil 1 Turbo Diesel, which should be 5W40 again, and be diesel rated. It was to be reintroduced sometime in April, but I haven't seen it around here yet, although I've heard that it's available online. The old Mobil 1 Truck & SUV was the same as Mobil Delvac 1; I'm sure that someone will determine if the new Mobil 1 Turbo Diesel is the same as Mobil Delvac 1. Synthetics are better for all the reasons mentioned, but if you change oil at less than manufacturer recommendations, it can be pricey. And 5W40 is safe to used year round, not just during the colder months. As mentioned, use of synthetics and a capable oil bypass system with regular oil samples will provide the best benefit for both truck and pocketbook. I'm looking at the FS2500 from Filtration Solutions as it appears to be the best bypass system available at any price.
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