







⚙️ Shift into the future with STARFIRE – where power meets precision.
STARFIRE SAE 50W Full Synthetic Transmission Oil is a heavy-duty gear oil designed for manual transmissions operating under extreme heat and heavy loads. Its advanced synthetic formula ensures smoother shifting, improved fuel efficiency, and extended drain intervals thanks to superior oxidation resistance and anti-wear additives. Trusted by fleet managers and mechanics, it meets API MT-1 and multiple OEM standards, making it the go-to choice for demanding on- and off-highway applications.










| ASIN | B01J8HR1CK |
| Best Sellers Rank | #58,517 in Automotive ( See Top 100 in Automotive ) #138 in Transmission Fluids |
| Brand | STARFIRE |
| Brand Name | STARFIRE |
| Container Type | Pail |
| Customer Reviews | 4.5 out of 5 stars 190 Reviews |
| Item Form | Oil |
| Item Height | 9.5 inches |
| Liquid Volume | 5 Gallons |
| Manufacturer | StarFire Premium Lubricants |
| Material | Synthetic |
| Package Information | Pail |
| Recommended Uses For Product | • API MT-1 • Eaton PS-164 Rev 7 • Navistar/International TMS 6816 • Mack TO-A Plus • MERITOR® O-81 (Publication TP-90014) • ZF Freedomline Recommended Uses For Product • API MT-1 • Eaton PS-164 Rev 7 • Navistar/International TMS 6816 • Mack TO-A Plus • MERITOR® O-81 (Publication TP-90014) • ZF Freedomline See more |
| UPC | 810029022057 |
| Unit Count | 640.0 Fluid Ounces |
| Viscosity | 50W |
A**I
Eaton 10 speed
2001 Freightliner Century 10 speed, the oil works great. Shift smoothly 👍
A**O
Great product
Fast delivery you can see it he quality right off hand
T**N
Good oil.
I put it in my 1992 international 6 speed manual. Shifts good
A**A
Great Deal
Called the local shop in town and for the same oil it costs over $600 so this is an amazing deal! I highly recommend this product. Does the job for fraction of the local prices.
G**E
great price fast shipping
great price fast shipping
G**A
It’s oil
Recommend to use in city not on highway
C**J
Good deal.
This is a really good buy. The only place I could buy synthetic 50W locally was at auto parts stores, and then only in quarts, which is really over priced. This a much better deal.
M**N
Good value
Unfortunately product was damaged during shipping and was never delivered and was issued a refund instead of being reshipped.
Trustpilot
4 days ago
5 days ago