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top rated product from a trusted manufacturer. One 25 ml bottle treats 250 litres of unleaded petrol so very economical protection against possible expensive engine damage on a classic vehicle.
Verified purchase: Yes | Condition: New
My car needs such a product. I was about to run out of it, so I bought some more. Do I know if it is of good quality? Is it good value. How am I to know????? Two absolutely stupid 'yes or no' options to stupid questions. Maybe this product damages my car's engine, so much so that the engine needs replacing after 5 years - how am I to know??? How can I give it a valid star rating??
Verified purchase: Yes | Condition: New
My 1968 Morris has hardened valve seats, and in theory is ok to run on unleaded. I use Valvemaster as additional insurance, given that I use the car a lot and want to give it all the help I can with modern ethanol containing petrol.
Verified purchase: Yes | Condition: New
This product is a great additive for unleaded petrol, to use in a car that was designed for 4-star fuel. I've used it for many years without issues.
Verified purchase: Yes | Condition: New
Car runs much better and easy to use (Saab 96)
Verified purchase: Yes | Condition: New
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