Need help with my 1998 mustang

Asked by Aug 04, 2017 at 06:05 PM about the 1998 Ford Mustang

Question type: Maintenance & Repair

I just had an oil change in my 1998 v6 mustang.
The car has always had 5w30 since it was
manufactured and they put in 5w20. Before I notice
they changed the oil I started hearing a knocking
noise that comes and goes and a loud whistle
when I shut the car off. I got them to drain it and
put 5w30 back in but I am still hearing it just not as
loud.it didnt make these noises till they put the
5w20 in. Any idea on what this is or how to fix it?

2 Answers

298,995

If it was knocking before the oil change, then the oil has nothing to do with it. The whistle when shutting off the car means you have a crankcase vent issue. Check the PCV valve, might be clogged.

1 people found this helpful.

Ok thanks, that solves the whistle, but the other noise wasn't happening before the oil change, it started the day after. You think something got damaged?

Your Answer:

Ford Mustang Experts

  • #1
    Tom Demyan
    Reputation
    5,150
  • #2
    F_O_R
    Reputation
    1,710
  • #3
    Bob Beaman
    Reputation
    1,450
View All

Related Models For Sale

Used Chevrolet Camaro
6 Great Deals out of 999 listings starting at $4,500
Used Chevrolet Corvette
10 Great Deals out of 531 listings starting at $11,700
Used Ford F-150
115 Great Deals out of 11,141 listings starting at $369
Used BMW 3 Series
85 Great Deals out of 2,024 listings starting at $1,500
Used Jeep Wrangler
17 Great Deals out of 1,951 listings starting at $5,995
Used BMW M3
4 Great Deals out of 61 listings starting at $11,800
Used Chevrolet Silverado 1500
121 Great Deals out of 11,301 listings starting at $4,500

Used Cars For Sale

2018 Ford Mustang For Sale
309 listings starting at $28,937
2017 Ford Mustang For Sale
8 Great Deals out of 309 listings starting at $24,000
2016 Ford Mustang For Sale
4 Great Deals out of 85 listings starting at $21,995
2015 Ford Mustang For Sale
4 Great Deals out of 97 listings starting at $20,742
2014 Ford Mustang For Sale
87 listings starting at $15,875

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.