Oil question
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Oil question in Past Cadillac Vehicle Discussion; Hey people. Ok, I was at school today talking with one of the security guards who also happens to own ...
  1. #1
    HollywoodHicks1's Avatar
    HollywoodHicks1 is offline Cadillac Owners Fanatic
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    Lightbulb Oil question

    Hey people. Ok, I was at school today talking with one of the security guards who also happens to own a 1990 DeVille. So he goes on to tell me that his mechanic/friend used a mixture of castor oil and motor oil when it is time for an oil change. He then said that the guy told him that it is very helpful and it may as well change the time lengths at which you change your oil. Like instead of 3000 miles, the guy told him maybe 4000-5000 miles. He also told him that if everything goes well, you may not even have to. He wasn't so sure about not changing it, and neither was I. I've heard of people doing this before, but I just wanted to be sure about it before I tried it. I know castor oil provides an excellent lubricant. I decided to look to you guys first before I consulted someone else. SO, is castor oil and motor oil mixed a good thing? If so, then what kind?

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  3. #2
    JJhomer83's Avatar
    JJhomer83 is offline Cadillac Owners Connoisseur
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    Re: Oil question

    Quote Originally Posted by HollywoodHicks1
    Hey people. Ok, I was at school today talking with one of the security guards who also happens to own a 1990 DeVille. So he goes on to tell me that his mechanic/friend used a mixture of castor oil and motor oil when it is time for an oil change. He said that the guy told him that it is very helpful and it may as well change the time lengths at which you change your oil. instead of 3000 miles, he said maybe 4000-5000 miles. He wasn't so sure about, and neither was I. I decided to look to you guys first, so basically I am wondering if castor oil and motor oil mixed are a good thing.
    To my knowledge there shouldn't be a problem with mixing oil. I do it all the time when i run out of one brand and the other is on sale. I would not go more than 3500 miles before an oil change. I NEVER go over 3000 most of the time i change it between 2800 - 2900.

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