JOJOY LUX Diesel Fuel & DEF Cap
for Ram
Price as of 2026-06-21. Check Amazon for the current price.
Quick Decision
Is This Right For You?
- •Buyers who prioritize quality over price in caps
- •Those who want a top-rated option — in the top 18% of caps by rating
- •You're on a tight budget — $17 above the category average of $14
- •ACDelco GM Original Equipment RC27 offers a better rating (4.7/5) at a similar or lower price ($15)
- •Gates 31336 Radiator Cap — 60% cheaper at $12 (Score B)
- •ACDelco GM Original Equipment RC27 — higher rated at 4.7/5 ($15)
📊 Based on data analysis of 192 products in this category.
Mubboo Score: B
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other caps
Computed from live Amazon rating, review count, and price across 192 caps available to US consumers · last refreshed 2026-06-21.
How It Compares
This Product JOJOY LUX Diesel Fuel & DEF Cap | Most Popular Dorman 54201 Coolant Reservoir Cap | Best Rated ACDelco GM Original Equipment RC27 | Best Value Gates 31336 Radiator Cap | |
|---|---|---|---|---|
| Price | $30.95 | $13.22 | $14.99 | $12.38 |
| Rating | 4.6/5 | 4.6/5 | 4.7/5 | 4.4/5 |
| Reviews | 2,816 | 4,813 | 1,950 | 845 |
| Mubboo Score | B | A- | B+ | B |
What People Say
Synthesized from 40 reviews · 100% verified purchases.
Ensure exact fit by checking vehicle compatibility charts, as some caps may not seal properly and could trigger the check engine light. Compare prices locally, and verify if tether attachment meets your needs.
- Easy installation and perfect fit
- Resolves check engine light or EVAP error codes
- Secure seal and contamination prevention
- Good value for money
- Durable construction
- Inconsistent fit across vehicle models
- Sealing issues causing check engine light to stay on
- Tether piece may not attach properly
- Price may be higher than local stores
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Bottom Line
JOJOY LUX Diesel Fuel & DEF Cap earns Mubboo Score B. Priced at $31 — a premium option, above the category average of $14. Rated 4.6/5 from 2,816+ reviews. Strong buy if: buyers who prioritize quality over price in caps, those who want a top-rated option. Skip if: you're on a tight budget — Dorman 54201 Coolant Reservoir Cap (Score A-, $13) may fit better.
Frequently Asked Questions
Is the JOJOY LUX Diesel Fuel & DEF Cap worth buying in 2026?
It earns a Mubboo Score of B, with a 4.6/5 rating from 2,816 reviews — better than 82% of caps we track.
How much does the JOJOY LUX Diesel Fuel & DEF Cap cost?
It is currently $30.95 — premium-tier pricing for caps.
How does the Diesel Fuel & DEF Cap compare to other caps?
The category's most-reviewed alternative is the Dorman 54201 Coolant Reservoir Cap (4.6/5, 4,813 reviews, $13.22). The Diesel Fuel & DEF Cap carries a Mubboo Score of B vs A-.
Sources & References
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-21) and may change.