AmazonBasics High Mileage Motor Oil - Full Synthetic - 5W-20 - 1 Quart - 6 Pack
More product info
From Amazon Basics
Refresh the report to view the most up-to-date data available:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Top products in Motor Oils with authentic reviews:
Report Card
Most Trusted Reviews
TRUST
- Verified Purchaser
- Take-Back Reviewer (3 deleted Reviews; avg. rating: 4.3)
- Critical Reviewer (avg. rating: 4.1)
Least Trusted Reviews
TRUST
- Unverified Purchaser
- Take-Back Reviewer (57 deleted Reviews; avg. rating: 4.3)
- Brand Repeater (20 of 1073 reviews for this brand; avg rating: 4.1)
- Overlapping Review History: reviewed 4 of 9 top products
- Critical Reviewer (avg. rating: 4.3)
Analysis Details
We discovered a total of 549 deleted Reviews for this product, with an average rating of 4.7. 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.
2 of the 45 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 4.0 while the verified purchasers have rated this product an average of 4.9. 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.
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.
Take-Back Reviewers
25 of the 45 reviewers have had at least one of their past reviews for another product deleted. This is an excessively large percentage of Take-Back Reviewers which may indicate unnatural reviews.
Brand Repeaters
16 of the 45 reviewers have reviewed other products for this brand. While this is more Brand Repeaters than we'd expect to see, it does not appear to have a significant impact on the overall rating.
-
- 31%
- From reviewers with an overrepresented participation
We see the following 1 participation group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 14 reviewers (or 31%) are within an overrepresented participation group. While this is more reviews from overrepresented participation groups than we'd expect to see, the discrepancy in ratings between reviewers in an overrepresented participation groups and all other reviewers isn’t significant enough to rule out the possibility of it being due to random chance.
-
- 0%
- Created over 23 days
However, we see the following 23 days exceeding this threshold:
- 21 Reviews on Dec 15, 2019 (Avg. rating: 4.5)
- 20 Reviews on Dec 30, 2019 (Avg. rating: 4.8)
- 17 Reviews on Jun 17, 2019 (Avg. rating: 5.0)
- 17 Reviews on Jan 5, 2020 (Avg. rating: 4.8)
- 17 Reviews on Apr 8, 2019 (Avg. rating: 4.6)
- 16 Reviews on Jul 2, 2019 (Avg. rating: 5.0) Show All
Read more about our Rating Trend test.
-
- 0%
- Have an overrepresented word count
Read more about our Word Count Comparison test.
(5.0/5)
(5.0/5)
(5.0/5)
(5.0/5)
4 of the 45 total reviews for this product use substantial repetitive phrases between them. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
13% also reviewed:
Monster & Master Brass Angle Stop Valve... by Monster & Master
11% also reviewed:
Wickedly Prime Organic Hibiscus Tea, Full-Leaf... by Wickedly Prime
11% also reviewed:
Wickedly Prime Masala Butternut Squash Soup, 17... by Wickedly Prime
9% also reviewed:
Dove Advanced Hair Series Conditioner,... by Dove
9% also reviewed:
Wickedly Prime Roasted Pecans, Kona Coffee, 5... by Wickedly Prime
9% also reviewed:
SoundHealth Extra Strength Heartburn &... by SoundHealth
9% also reviewed:
DieHard DHC18 18 " Conventional Wiper... by DieHard
9% also reviewed:
AmazonCommercial Light to Medium Strength Duct... by AmazonCommercial
6 of the 45 reviewers have substantial overlapping product review history. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
4.4 Product's Average Ease Score
4.4 Category's Average Ease Score
Read more about our Reviewer Ease test.
-
- 0%
- Admitted to receiving an incentive
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.