Mobil 5000, Conventional Oil?
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Northstar Engines and System Technical Discussion Discussion, Mobil 5000, Conventional Oil? in Cadillac Engine Technical Discussion; I see some people posting that this is a synthetic blend but per the specs adn explanations on mobil 1's ...
  1. #1
    GuErrO is offline Cadillac Owners Member
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    Mobil 5000, Conventional Oil?

    I see some people posting that this is a synthetic blend but per the specs adn explanations on mobil 1's site it states that it is a conventional oil. I have yet to change the oil on my recent purchase of a 2002 Deville and would like to stick with conventional oil and was wondeirng if this would be a good choice? Thanks for all the help and replies.

    Guero

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    Concourson20s is offline Cadillac Owners Member
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    Re: Mobil 5000, Conventional Oil?

    It is if your going to be following 3k mile service intervals. If your going to be changing the oil everytime the IPC tells you to, better stick to full synthetic formulas, or you'll build up sludge in no time.

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    mcowden is offline Cadillac Owners Connoisseur
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    Re: Mobil 5000, Conventional Oil?

    Concourson20s, have you ever read the "Northstar oil issue" thread on this forum? The idea that 3k mile oil changes are necessary has been all but completely debunked, and the need for synthetic oil is a myth. If Mobil wants to guarantee their conventional oil to 5000 miles, they're telling you it's OK to do so and it won't violate any manufacturer's requirements. The old sludge argument doesn't make sense any longer because that problem was fixed long ago. Read the thread I mentioned above. There's a lot to read, but it's educational. Whatever you do, don't waste your money on Amsoil, remember that Teflon is for pots and pans and plumbing and not for the insides of engines, and use good quality filters.
    Mike

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    GuErrO is offline Cadillac Owners Member
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    Re: Mobil 5000, Conventional Oil?

    thnx for the reply, i want a good conventioonal oil and this mobil 5000 is the onyl mobil conventional that local stores carry, i will be changing my oil every 3000 miles cause thats what i ahve done with every car i have owned and its worked great so far, was just wondering if this oil was conventional for sure or synthetic, I do not want synthetic!!!!

  6. #5
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Mobil 5000, Conventional Oil?

    Quote Originally Posted by Concourson20s
    It is if your going to be following 3k mile service intervals. If your going to be changing the oil everytime the IPC tells you to, better stick to full synthetic formulas, or you'll build up sludge in no time.
    Hmm, that's strange. I follow the OLM, get about 7K between oil changes and there is no sludge build up.

  7. #6
    eldorado1 is offline Cadillac Owners Connoisseur
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    Re: Mobil 5000, Conventional Oil?

    Quote Originally Posted by mcowden
    remember that Teflon is for pots and pans and plumbing and not for the insides of engines, and use good quality filters.
    Not even!

    http://www.legalnewswatch.com/news_204.html

  8. #7
    Concourson20s is offline Cadillac Owners Member
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    Re: Mobil 5000, Conventional Oil?

    Quote Originally Posted by mcowden
    Concourson20s, have you ever read the "Northstar oil issue" thread on this forum? The idea that 3k mile oil changes are necessary has been all but completely debunked, and the need for synthetic oil is a myth. If Mobil wants to guarantee their conventional oil to 5000 miles, they're telling you it's OK to do so and it won't violate any manufacturer's requirements. The old sludge argument doesn't make sense any longer because that problem was fixed long ago. Read the thread I mentioned above. There's a lot to read, but it's educational. Whatever you do, don't waste your money on Amsoil, remember that Teflon is for pots and pans and plumbing and not for the insides of engines, and use good quality filters.
    Actually no I haven't. I'll check it out though. I'm always open to new information. I remember one time a mobil rep came over to the shop and did a demonstration using conventional oils, and mobil 1. They took a 75k northstar which followed a 5k-7k interval, and it had slight sludge buildup, they took another northstar with 80k which followed a 10k interval, and it looked like the oil had been changed every 2k miles. They explained the differences, and why GM apporves the use of synthetic oils for northstar engines, and how regular oils could not withstand more than 3k miles before they are actually "broken down" and do more harm than good to the engine.
    So judging from what they showed us there, and from the many northstars that came in with oil consumption problems, due to dirty, clogged oil rings, I beleived what they said. Our dealer stressed 3k mile oil changes, to avoid any problems, even if u went with full synthetic. Ofcourse info is constantly updated, so I'm going to read that article and catch up on the issue.

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Mobil 5000, Conventional Oil?

    Remember, that "demonstration" was from a Mobil rep who was trying to sell something. Here is a little something I just read on another forum but is worth considering when someone tells you that even with todays engines and oils you still should change oil at 3K.

    Marc Graham (president of Jiffy Lube) is quoted in Lubricants World Magazine as stating if they can get customers to shorten their drain intervals by 100 miles it would mean an additional $20 million in revenue for the company per year and if they can get consumers to do one more oil change per year it would mean $294 million for the oil change alone and $441 million in revenue when they include ancillary products and services that go along with the oil change. Is that an incentive to keep pushing 3/3000 oil changes.

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