5 out of 5 stars
by Apr 16, 2022
It really works!
I was having a check engine light come on every 3 weeks, I would reset it then it started coming on every few days. The code referred to the catalytic converter /02 sensor. Not having the money for a costly catalytic converter replacement, I tried other products. The light would say off longer but come back on again. Once I used the Dura Lube Severe formula, I am happy to say that my car runs better and no check engine light for 2 months now. This is why I bought it gain to keep my catalytic system clean.
Verified purchase: Yes | Condition: New
Fixed my P0421 CEL issue
Did Quick Oil Change put too much oil in your engine? This saved me replacing catalytic converter and Oxygen sensors. So far so good. Car runs smoothly, improved power and fuel economy.
Verified purchase: Yes | Condition: New
Catholic converter cleaner
Wasn't able to tell if it really worked or not
Verified purchase: Yes | Condition: New
Surprise!!
Did the trick.
Verified purchase: Yes | Condition: New
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My truck was throwing a code P0420 Code underperformance from ... [Go to full review]
Jun 9, 2022
Analysis Details
Fail
- ~40%
- Used substantial repetitive phrases
Approximately 40% of reviews use substantial repetitive phrases between them. These reviewers have rated this product an average of
4.7while reviews without substantial repetitive phrases rated this product an average of
3.6. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
Fail
Reviewers of this product have ALSO reviewed the following products:
- ~15%
- Substantial overlapping review history
Approximately 15% of reviewers have substantial overlapping product review history. These reviewers have rated this product an average of
5.0while the reviewers who have a more unique product review history rated this product an average of
3.8. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.
Warn
- 1
- Review has been deleted
We discovered a total of 1 deleted Review for this product, with an average rating of 5. Even though deleted reviews don't affect the average rating, the fact that action was taken to delete reviews raises some red flags about the integrity of the reviews for the product as whole.
There are a few limitations to keep in mind regarding the Deleted Reviews test:
- We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
- We have no information on reviews that were never published in the first place.
- We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.
Read more about our Deleted Reviews test.
Warn
Brand Loyalists
- <10%
- Reviewed mostly products from this brand
Less than approximately 10% of reviewers have reviewed multiple products but half or more of their reviews are for this brand. While this is more Brand Loyalists than we'd expect to see, the discrepancy in ratings between the Brand Loyalists and non-loyalists isn't significant enough to rule out the possibility of it being due to random chance.
Warn
Take-Back Reviewers
- ~35%
- have previously deleted reviews
Approximately 35% of reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, the discrepancy in ratings between the Take-Back Reviewers and reviewers who don't have any deleted reviews in their history isn't significant enough to rule out the possibility of it being due to random chance.
Pass
- <10%
- Created on high-volume days
Pass
- 0%
- Unverified Purchases
10
of the
2,969total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
from unverified purchasers
from verified purchases
Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.
Pass
- <10%
- Have an overrepresented word count
We didn't find any review word count groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Word Count Comparison test.
Pass
The ease score is the average rating for all reviews that a given reviewer submits. The average ease score for reviewers of this product is 3.9, while the average ease score for reviewers in this category is 4.3.
Pass
- <10%
- Admitted to receiving an incentive
N/A
We haven't collected sufficient data to run this test yet. more info