platinum spark plugs or oem?

Asked by Mar 21, 2010 at 10:38 AM about the 2004 Jeep Grand Cherokee Special Edition

Question type: Maintenance & Repair

I just replaced the original spark plugs in my 2006 Jeep Grand Cherokee 4.7 with 54000 kms. It appears to be more responsive. The dealer wanted their service department to do the work and charge me a crazy amount for this. He even said that unless the plugs were replaced at the recommended mileage even though I put platinum plugs in, it could void the power train warranty. Also should I replace the difs fluids with synthetic (the Jeep is never really driven off road)?

1 Answer

9,600

Newer cars have tighter tolerance engines that can benefit from synthetic oil. So if you can afford it use it. Just make sure to use a quality "full" synthetic. You will get less internal wear and a very small increase in fuel mileage. And as for the the diffs, synthetic fluid can make them run cooler and last longer.

Your Answer

Jeep Grand Cherokee Experts

  • #1
    inuevafreak
    Reputation
    2,150
  • #2
    Tom Demyan
    Reputation
    2,020
  • #3
    thejeepdoctor
    Reputation
    2,000
View All

Related Models For Sale

Used Dodge Durango
352 Great Deals out of 23,718 listings starting at $1,500
Used Ford Explorer
1,166 Great Deals out of 64,664 listings starting at $1,200
Used Toyota 4Runner
296 Great Deals out of 27,600 listings starting at $1,900
Used Jeep Wrangler
438 Great Deals out of 20,081 listings starting at $2,500
Used Chevrolet Tahoe
886 Great Deals out of 39,487 listings starting at $1,799
Used Ford F-150
3,205 Great Deals out of 226,286 listings starting at $1,250
Used Chevrolet Silverado 1500
2,924 Great Deals out of 161,755 listings starting at $1,295
Used BMW X5
323 Great Deals out of 15,326 listings starting at $1,995
Used Honda Accord
884 Great Deals out of 79,049 listings starting at $1,444

Used Cars For Sale

2018 Jeep Grand Cherokee For Sale
6 Great Deals out of 32,989 listings starting at $24,192
2017 Jeep Grand Cherokee For Sale
165 Great Deals out of 7,390 listings starting at $21,400
2016 Jeep Grand Cherokee For Sale
79 Great Deals out of 1,989 listings starting at $18,499
2015 Jeep Grand Cherokee For Sale
237 Great Deals out of 7,569 listings starting at $12,997
2014 Jeep Grand Cherokee For Sale
128 Great Deals out of 4,931 listings starting at $12,500

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.