Additionally, fill the big primary fuel filter (spin-on type) with Liqui Moly Diesel Puge and put the rest in the tank. This should boost the cetane rating and clean up your injectors if they’re gummed up.
Reviews of LIQUI MOLY fuel filter
17 votes
So far all i’ve done is swap out fuel filter, ran liqui moly diesel cleaner and inspect for any debris ( found nothing that would indicate a HPFP failure.
Every other oil change I run a bottle of liqui molly diesel purge when I replace the fuel filter. Most reliable car I've ever had.
I poured in the whole bottle when changing fuel filters recently, and the engine seemed to run quieter with better fuel efficiency right afterward.
Ran a bottle of it through once, saw no difference.
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What we know about LIQUI MOLY fuel filter
The brand is registered in Germany.
In March 2026, PartReview does not yet have a formed opinion of LIQUI MOLY fuel filter. This part is not in the ranking due to insufficient reviews. You can help by adding a review for LIQUI MOLY fuel filter.
Currently there are 5 reviews and 17 votes. Average rating — 4 out of 5. Vote balance: 13 up, 4 down.
Users also evaluated the qualities of LIQUI MOLY fuel filter:
- Power - car struggles to accelerate, especially at high rpm - rated positively. 3.6 points out of 5.
- Hesitation - jerks or surges while cruising, making driving uneven - rated ambivalently. 3 points out of 5.
- Starting - hard starts, particularly after the car has sat - rated positively. 4 points out of 5.
Fuel filter LIQUI MOLY in car-specific ratings
See which car brands and models owners choose LIQUI MOLY fuel filter for. Below are car-specific ratings where this part is in the Top-3:
- LIQUI MOLY ranked #1 in fuel filter ratings for: Volkswagen Golf .