Cheap insurance - put in a winterizer AND run your engine for a little bit to get it to cycle through the filters and lines. I use Stanadyne’s blue label additive year round but it also has a winterizer agent in it.
Pros: cheap insurance
Reviews of STANADYNE fuel additives
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6 reviews
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STANADYNE
Italy
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I do every tank. The whole family knows to add it when driving the truck. Conditioner year round. Stanadyne or Motorkote and I add cetane. Never had an injector issue.
Pros: never had injector issue
Every tank since has had additive. Stanadyne usually but will run any of the major ones.
Pros: prevent fuel pump noises
On my Mk8 I've been running Stanadyne fuel additive in every tank of Shell, and throwing in a can of Seafoam every 5000km.
Mileage: 5000 km
I have the exact same type of truck I run stanadyne after every fill up during the winter for extra protection against gelling since it gets very cold where I live. And I run it every other fill up during the warm months for extra lubrication since diesel is not as good quality as it once was and lb7 injectors need as much lubrication as they can get
Pros: extra protection against gelling
Cons: diesel not as good quality
Additive I have been using was Stanadyne perf, but after seeing the results of tests, I have just purchased a gal of Opti XPD to replace my Stanadyne
Pros: purchased Opti XPD
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What we know about STANADYNE fuel additives
The brand is registered in Italy.
In March 2026, PartReview does not yet have a formed opinion of STANADYNE fuel additives. You can help by adding a review for STANADYNE fuel additives.
Currently there are 6 reviews and 18 votes. Average rating — 4.5 out of 5. Vote balance: 18 up, 0 down.
Users also evaluated the qualities of STANADYNE fuel additives:
- Starting - easier cold starts after treatment are noticeable - rated positively. 4.5 points out of 5.
- Hesitation - less stumble on acceleration improves drivability - rated positively. 4 points out of 5.
- Exhaust smell - fuel odor or smoke may lessen after use - no rating yet
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