






⚙️ Shift smoother, last longer — the ultimate gear oil upgrade!
The 50304 MT-90 75W-90 GL-4 Manual Transmission Lubricant is a premium gear oil designed to protect and extend the life of manual transmissions and transaxles. Its advanced formula ensures quicker, smoother shifts by optimizing synchronizer friction, while its GL-4 rating makes it safe for brass synchros, avoiding damage common with GL-5 oils. Trusted since 1979, Red Line delivers uncompromising performance for professional-grade vehicle maintenance.






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