Q: What's the difference between Blue Thunder Sport Formula and Race Formula?

A: Blue Thunder Sport Formula features a unique additive called ZX-7, that provides over-lean indication/ protection. When an engine is over-leaned, internal engine temperatures dramatically increase. At these critical temperatures, the ZX-7 in Blue Thunder Sport Formula actually changes from a lubricant to a combustible, giving an immediate indication to the driver that the mixture is too lean. On the track, if the engine is over-leaned, the driver will immediately notice that the car hesitates during acceleration, indicating that it's time to pull in and richen the mixture. If the engine is continued to run at these over-lean settings, it will quit before damage to internal engine components occur.

Blue Thunder Race Formula features a caster-base oil package that utilizes the highest purity caster oil, combined with a small percentage of a synthetic additive, to reduce carbon buildup. Caster offers maximum engine protection under the highest stress and heat conditions. Blue Thunder Race Formula allows the broadest possible tuning range. This allows engines to be tuned beyond peak lean settings for maximum performance and fuel economy, while preventing engine over-lean sagging/bogging.

Q: Which Blue Thunder Formula is right for me?

A: Blue Thunder Sport Formula is ideal for those who are new to gas cars or for drivers who want maximum protection for their engines. It prevents engine damage due to unknowingly running an engine over-lean. This is especially important for your first time nitro users.

Blue Thunder Race Formula is blended for racers who want maximum performance from their engine. In order to extract every last bit of power and fuel economy from an engine, this is the best choice.

Q: Why is Blue Thunder blue? When I take my engine apart, sometime the internal parts are blue. Is this a problem?

A: A small amount of blue dye is added to Blue Thunder to make it more visible. Fuel's natural color is of weak tea (transparent brown) and is difficult to see in your car's fuel tank. The blue die is added to make it easier to see the fuel level in the tank. Plus, when doing quick pit stops, it makes it easier to verify when the tank is completely filled. The blue dye molecularly attaches to the oil in Blue Thunder. When disassembling an engine, a blue tint indicates a concentration where oil has been. The blue can easily be wiped off with a clean rag or cotton swab.

Q: Blue Thunder is offered in 10, 20, 30 and 40%. What is the difference and which should I use?

A: These percentages refer to the Nitromethane content. Nitromethane is an oxygenator and can significantly boost engine power. It's much like raising the octane in the gas in your full-scale car, but nitro has an even greater effect. The most popular nitro by far is 20% and we'd recommend this amount for nearly every application. When the traction comes up with 4WD on-road cars and the track is big, stepping up to 30 and even 40% is common practice. On slippery tracks use 10% for better control. Blue Thunder is specially blended so that changing from one nitro content to another has minimal effect on engine tuning. You can usually make nitro changes without having to re-tune your engine.