I have 90 in my area will I need a full bottle to make 93 or half with 18gallon tank?

one bottle treat will 18 gallons or if you want to be precise one ounce per gallon of unleaded fuel. I use this in my Shelby SC Cobra 427. If you are just trying to bump up the rating I would find 93 fuel as it can get expensive to use at each fill up. I run only 93 NON ethanol gas and use it at each tank refill but then my car is primarily a show car. Hope this helps.

Is there a mixing chart for this stuff? Does more product mean higher octane numbers?

I don't know of a mixing chart and the octane level would have to increase more product. If I were you I'd contact Royal Purple. I'm sure they could answer your questions.

Can I mix this with 93 octane pump gas?

My 92 Volvo requires 93 octane. I got water in high test so decided to use regular gas and add booster. Very happy with the result as plenty of power.

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Royal Purple 11757 Max Boost Octane Boost Case, 16 fl. oz (6 Pack)

Product ID: 43342289

⚡Restores engine power & fuel economy

⛽Boosts octane by up to 30 points

🛠️Reduces knocking & pinging

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Description

⛽ Power Up Your Drive — Don’t Let Low Octane Hold You Back!

TRUSTED BY PROS - Highly rated and race-tested, join the elite drivers who demand max boost.
ADVANCED MMT FORMULA - Cutting-edge chemistry stabilizes fuel and reduces harmful emissions.
FUEL ECONOMY REVIVAL - Restore lost power and improve mileage, making every drop count.
KNOCK FREE CONFIDENCE - Eliminate engine knocking and pinging to protect your ride under pressure.
RACE READY OCTANE SURGE - Elevate your fuel’s octane rating by up to 3 numbers for peak engine performance.

Royal Purple Max Boost is a premium octane booster and fuel stabilizer designed to raise gasoline octane by up to 30 points, reduce engine knocking, and restore power and fuel efficiency. Formulated with MMT for superior performance, it’s ideal for racing and high-demand driving conditions.

Specifications

ASIN	B072K4S96B
Best Sellers Rank	#34,665 in Automotive ( See Top 100 in Automotive ) #347 in Motor Oils
Brand	Royal Purple
Customer Reviews	4.8 4.8 out of 5 stars (248)
Date First Available	June 9, 2017
Item Weight	5.05 pounds
Item model number	11757
Manufacturer	Royal Purple
Manufacturer Part Number	11757
Product Dimensions	9.2 x 7.1 x 6.5 inches

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