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.

Royal Purple 11757 Max Boost Octane Boost Case 16 Fl

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Description

For best performance, follow the manufacturer's recommendations in your vehicle owner’s manual.
Reduces engine knocking and pinging
Raises octane rating up to 30 points or 3 numbers
Restores power and fuel economy

Royal Purple's new Max-Boost is a high performance octane booster and fuel treatment for racing applications that increases gasoline octane, reduces emissions, and enhances engine performance while stabilizing fuel. Formulated with MMT, Max-Boost delivers the best octane enhancement to help eliminate engine-damaging detonation, pre-ignition, and pinging or knocking from low-octane gasoline. Max-Boost is the best fuel system stabilizer for anyone looking to significantly boost engine performance and efficiency.

Specifications

ASIN	B072K4S96B
Best Sellers Rank	#115,529 in Automotive ( See Top 100 in Automotive ) #377 in Oil & Fluid Additives
Brand	Royal Purple
Customer Reviews	4.8 4.8 out of 5 stars (236)
Date First Available	24 June 2025
Item Weight	2.29 Kilograms
Item model number	11757
Manufacturer	Royal Purple
Manufacturer Part Number	11757
Model	11757
Product Dimensions	23.37 x 18.03 x 16.51 cm; 2.29 kg

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

Description

Specifications

Common Questions