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2001 Mitsubishi Montero Changing engine oils

Tiny
NYAMASON
  • MEMBER
  • 2001 MITSUBISHI MONTERO
  • V6
  • 4WD
  • AUTOMATIC
  • 202,000 MILES
I have been using the same conventional oil for the past 13 years (switched to high-mileage a few years ago). In December, I was convinced to try the Eco-friendly high mileage oil. Noticed a change in the way my car sounded within a day- a louder whirring noise upon acceleration. Didn't pay it much mind, but more recently the whirring noise has become louder and more strained, especially when accelerating. I've never had this problem before, and only noticed it after the oil change (the rear differential was also changed at the same time, but I'm assuming that's unrelated?). Could it be the new oil causing my car to sound much louder and more strained?
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Monday, February 2nd, 2015 AT 11:18 AM

2 Replies

Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
I use Mobil, 7500 that extended mileage I suggest that u change the oil.U are going to hurt your engine.
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Monday, February 2nd, 2015 AT 12:44 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
To me it sounds like the fan clutch needs to be replaced. Here is a video on engine oil and how it affects your engine.

https://youtu.be/BJqbLex4C4A?si=y0I1B1kBBSqD0H_g

Please go over this guide and get back to us.
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Wednesday, July 24th, 2024 AT 5:34 PM

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