VP Racing 29505, Octanium Unleaded Octane Booster - Quart

Best price I could find was on Amazon mileage increased a little but under full throttle the engine seem to labor less when using this product, because of the onset of winter and summer blend gases I don't think there's a big difference between the grades anymore whether you use premium or regular or by brand for that matter

All I can say is this stuff really works. I have Nissan Skyline R33 and I put 93 octane gas in my car. With this stuff I can raise my octane up to 7 points which gets me at 100 octane or very close. As soon as I step on the accelerator I can feel the difference getting an instant increased in horse power because of the higher octane. I love this stuff it really works.

Excellent product

Kenne Bell Supercharged 5.0 Fox body was detonating on 93 octane. I could have dialed back the timing or boost level. Nah, not how I roll. Added this to a tank and took care of the issue. I add it every time I fill up. Not cheap, but horsepower never is.

Will treat 10-gallons of fuel, making 95 octane plus possible and truck runs great.

Good for a fill up

With today's gasoline, you may not be able to run your thirty plus year old classic muscle car on pump gas without knocking and pinging. Left unchecked, this will cause engine damage. We drive our 64 Tbird to cruise nights and perhaps other destinations. Our 390 behaves as it should, no knocks or ping. We just add VP when we fuel.

I used it in my Nissan GTR, it is the best Octane Booster,