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HT4100 4.1, 4.5, 4.9 Discussion, Putting Restore in my 93 Deville in Cadillac Engine Technical Discussion; I wasn't aware that sears had any technicians working in one of their service centers. Tire changers, lube boys, battery ...
  1. #16
    90BeigeElDorado is offline Cadillac Owners Member
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    Re: Putting Restore in my 93 Deville

    I wasn't aware that sears had any technicians working in one of their service centers. Tire changers, lube boys, battery installers, yes. Mechanics,(actually, in the modern automotive service industry mechanics don't exist, only techs) no. Listening to anything that a Sears tire installer has to say about engine longevity is like sticking your finger in a light socket. You'll get an answer to your question, just not the one you want.

  2. #17
    mike93 is offline Cadillac Owners Fanatic
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    Re: Putting Restore in my 93 Deville

    Yeah he's a master technician tech 4 does all th big work

  3. #18
    mike93 is offline Cadillac Owners Fanatic
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    Re: Putting Restore in my 93 Deville

    Another question Ive been using rotella is that relly gonna hurt the cat i put it on 2 months ago

  4. #19
    mike93 is offline Cadillac Owners Fanatic
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    Re: Putting Restore in my 93 Deville

    Tomorrow im gonna be sea foaming the motor cleaning out the whole motor

  5. #20
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    Sevillian273 is offline Cadillac Owners Connoisseur
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    Re: Putting Restore in my 93 Deville

    Quote Originally Posted by mike93 View Post
    Another question Ive been using rotella is that relly gonna hurt the cat i put it on 2 months ago
    No. Rotella is fine. No oil on the market today will ever have any effect on a catalytic converter.

    It is best to change the oil after a seafoam treatment. Follow the instructions on the can. Google it for tips on doing the treatment.

  6. #21
    mike93 is offline Cadillac Owners Fanatic
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    Re: Putting Restore in my 93 Deville

    Oh ok and people on here told me rotella will hurt the catalytic converter over time because of the zinc in the oil

  7. #22
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    Submariner409 is offline If it won't run, chrome it
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    Re: Putting Restore in my 93 Deville

    Rotella and its equivalents has the same ZDDP load that all automotive oils had up until about 4 - 5 years ago - when the EPA mandated a reduction in ZDDP in automobile oils to conform to some perceived air quality standard. So-called "off road', fleet and marine oils were unaffected by the changes.

    Your 1993 and my 2002 were born with a 900 - 1200 ppm ZDDP load in the oil from the factory. The catalytic converters are still fine.............

    Some rainy day spend some time digging deeply into the product spec sheets for several manufacturers and types of lube oils. Study viscosity, temperature, shear, and additive load specs to find out how they all differ. Read the labels. Just for grins and kicks, Google "bobistheoilguy".

  8. #23
    Ranger's Avatar
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    Re: Putting Restore in my 93 Deville

    Why do you insist on dumping all this snake oil in your motor? The only thing it will accomplish is to fatten the manufacturers, distributors and sellers wallets and give you a warm fuzzy feeling that you are doing something go for your car. All you need is regular oil and filter changes. Leave that crap on the shelves for the next sucker.

  9. #24
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    Re: Putting Restore in my 93 Deville

    Quote Originally Posted by Ranger View Post
    Why do you insist on dumping all this snake oil in your motor? The only thing it will accomplish is to fatten the manufacturers, distributors and sellers wallets and give you a warm fuzzy feeling that you are doing something go for your car. All you need is regular oil and filter changes. Leave that crap on the shelves for the next sucker.
    Agreed.

    If you want to get anal about performance, the most you can do is change tune-up items, making sure all fluid and filters are clean and making sure everything is correctly adjusted.

    When changing oil, fill it with your favorite brand 10W-30, just like the engine was spec'd for. You won't be accomplishing anything by deviating from it.

    When changing filters, choose your favorite OEM style filter. Don't buy into the "hi-flo" crap.

    When changing spark plugs, again, replace them with what the car was spec'd for. Choose your favorite brand single electrode platinum plug.

    If your car still runs poorly after this, either diagnose the problem or have it diagnosed by someone else. Don't throw parts at it.

    If the car runs fine, then drive it. Happy motoring.

  10. #25
    mike93 is offline Cadillac Owners Fanatic
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    Re: Putting Restore in my 93 Deville

    Ok guys ill listen to you but im ust gonna seafoam the intake to clean out the carbon deposits and everything

  11. #26
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    Re: Putting Restore in my 93 Deville

    The folks at Seafoam thank you.

    Make sure that the two EGR tubes down in the TB are open. If not, rod them out.

  12. #27
    steelybill is offline Cadillac Owners Enthusiast
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    Re: Putting Restore in my 93 Deville

    The only additive I ever use is Marvel Mystery Oil. It works great in airplanes, even though it isn't approved. Sticky valves are sometimes a problem in airplanes, and the Marvel frees them up very quick. I've used it in auto engines, but not as a regular diet. I believe that an engine that sits around for months at a time will benefit from the Marvel oil when first returned to service. It's labeled as "upper lube" also, but I never use it in the gas tank. I'm only going by the results, not by the hype. Most additives are petroleum distillate according to the labels.

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