Idemitsu Rotary Premix Synthetic Blend Fuel Additive — 1 Quart, Apex Seal Lubrication & Injector Cleaner

Idemitsu Synthetic Blend Rotary Premix is a 1‑quart fuel additive formulated to lubricate rotary engines, protect apex and side seals, and reduce friction when mixed with gasoline.

This premixed rotary fuel lube from Idemitsu is designed specifically for gasoline rotary engines to improve sealing performance, limit wear on critical components, and help keep fuel injectors and exhaust ports cleaner. It’s supplied ready to add directly to fuel—no separate mixing required—and is intended to supplement engine lubrication where rotor housings and apex seals need additional protection.

How does this premix improve rotary engine sealing and longevity?

The formula contains synthetic and conventional base stocks plus proprietary additives that boost seal lubrication and reduce abrasion under high temperatures. By improving the lubrication film on apex and side seals, it helps the engine maintain compression and reduces metal-to-metal wear.

• Targets apex seals, side seals, and rotor housings with additional lubricity
• Reduces friction between moving parts to lower wear
• Supports better sealing under thermal cycling and high RPM

Will this help keep fuel injectors and the exhaust port cleaner?

Yes — the cleaner additives in the premix help limit carbon deposits and buildup that can restrict injectors and clog exhaust ports. Cleaner fuel pathways can improve combustion consistency and reduce the need for frequent manual cleaning.

• Formulation minimizes deposit formation on injectors
• Helps prevent exhaust port clogging and reduces residue
• Supports more consistent fuel spray and combustion over time

How do I use Idemitsu Synthetic Blend Rotary Premix correctly?

Use the premix as directed by adding the specified quantity directly to the gasoline tank before refueling or per the product label instructions. Because the product is ready‑to‑use, there’s no extra mixing step; just pour the measured amount into the fuel and then fill the tank.

• Ready premix: add directly to gasoline—no dilution required
• Follow recommended dosage on the product label for each tank
• Use consistently for best protective effects and cleaner fuel systems

Is this suitable for all engines and driving conditions?

This premix is formulated exclusively for gasoline rotary engines and is not intended for diesel or non‑rotary engine applications. It performs under a range of operating conditions, from daily driving to spirited track use, where additional rotary lubrication is beneficial.

• Designed specifically for gasoline‑fueled rotary engines
• Not recommended for diesel or non‑rotary engines
• Helps during both street driving and higher‑stress engine use

Who is this for: Owners and technicians of gasoline rotary‑engine vehicles who want an easy, ready‑to‑use fuel lubricant to protect apex and side seals, reduce friction, and help keep fuel injectors and exhaust ports cleaner. It’s suitable for enthusiasts maintaining older rotaries, drivers seeking improved engine longevity, and service shops offering preventive maintenance for rotary engines.