6 Reviews
Tell people what you think
Darren Somerville
· July 26, 2014
The is the BEST engine flush for motorcycles and cars / trucks. Better gas mileage - YES! 17% better MPG on a car I was about to dump. It's cheaper to keep the car and get better mileage with the Oil... system and the Gas formula from Synergyn. SynergynUSA com ROCKS See More
Aubrey Hilliard
· December 18, 2013
I LOVE THIS PRODUCT! Everything else I've used was a waste of money. Not only do I get better gas mileage, but it stopped the knocking in the engine and made it run smoother and cooler. Worth every penny.
Stephen Rogers
· February 20, 2014
Amazing Stuff! I've used all the products on my H2, Truck and Vette. Runs like a nasty cat when I need the XTRA MPG or Speed. Thanks Synergyn. I love the fact that you guys are Red, White and True to ...the customer. See More
Webpro Intl
· December 27, 2013
Phenomenal savings in gas! Highly recommend these products
Synergyn Fuel Additive
· February 14, 2014
We're BIG fans of all the Synergyn XTrA MPG products
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