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Highlights
Quality
I mix it with the gas in the ratio recommended.
Well worth the money, especially with the cheaper 1 gal vs the smaller quarts.
Mechanic opened up my '96 honda civic engine with 120,000+ miles on it for valve adjustment and he called me over to take a loo... Read More
Price
The gallon size is enough for a long time and the price is great compared to smaller bottles.
So many good uses and good price buy the gallon.
Too bad it costs too much to figure that out.
Couldn’t find locally at a good price.
Shipping
Had a slight leak which coated the box but shipping company wrapped in plastic.
Packaging/appearance
If you use to much it will cause the engine to smoke out of the exsust.
I have looked at other peoples engines at 30k with brown sludge coating the valvetrain already.
Competitiveness
No spectacular results, just continued reliable operation, protection against ethanol and maybe a 1-2 mpg bump in my wife's toy... Read More
Now i'm cutting back to 4oz per 10 gallons fuel.
Overview
- How are reviewers describing this item?
great, good, clean, every and still. - Our engine has profiled the reviewer patterns and has determined that there may be deception involved.
- Our engine has determined that the review content quality is low.
- Our engine has analyzed and discovered that 72.5% of the reviews are reliable.
- This product had a total of 347 reviews as of our last analysis date on Aug 18 2021.
Helpful InsightsBETA
Posted by a reviewer on Amazon
With fast clean products you run the risk of clogging your sump pump oil filter oil galleries or worse creating compression issues from pitting that was sealed by buildup
Posted by a reviewer on Amazon
Bought this on a recommendation from a service tech
Posted by a reviewer on Amazon
Product is great but it came damaged and it took weeks to get a credit resolved
Posted by a reviewer on Amazon
Diesel engine problems in my ford econoline e350 van cured by marvel mystery oili was spending an extra 20 per tank on other additives
Posted by a reviewer on Amazon
If i failed my engine light would come on unless i stayed on top of it at all times
Posted by a reviewer on Amazon
Last time i had my fuel injectors system cleaned it cost me 1700
Posted by a reviewer on Amazon
Too bad it costs too much to figure that out
Review Count History
Price History
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