Red Line Synthetic Manual Transmission Oil
Advantages of Red Line Synthetic Manual Transmission Oil & Differential Oil
by Rick Muscoplat
Synthetic Manual Transmission Oil not only provides better oil stability, but it also provides smoother shifts because it’s slipperier and that helps synchronizers engage faster and more smoothly.
But not all synthetic manual transmission oils are actually real synthetics. Some are made from Group III base stocks. Real Group IV polyalphaolefin (PAO) base stock/ester oils will state that in their product description or in their product data sheets.
Here are some synthetic manual transmission oils made by RedLine that are PAO/ester, unless stated otherwise.
Red Line Manual Transmission MT-LV 70W/75W Oil
Red Line recommends their MT-LV 70W/75W for use in these 
applications: Mercedes 235.10, Dodge/Fiat BOT 350 M3, GM BOT 303 mod, Toyota/Scion Manual Transmissions Gear Oil LV, VW/Audi and BOT270A Graziano Transaxle for Aston Martin, Audi & Lamborghini.
MT-LV 70W/75W Oil is safe for brass synchros because it doesn’t contain the reactive sulfurs found in most GL-5 oils. Sulfur can eat away at the brass components in your transmission.
MT-LV 70W/75W Oil eliminates notchy shifting, even when cold and its low friction improves power transfer
MT-LV 70W/75W Oil Recommended for GL-1, GL-3 and GL-4 applications as well as where most special synchromesh fluids are specified
Compatible for all these applications:
API GL-4 / GL-3 / GL-1
SAE 70W/75W
Castrol BOT 270A – Graziano Transaxle for Aston Martin, Audi and Lamborghini
Castrol BOT 350 M3
Castrol BOT 303 mod
Dodge/Fiat 68092630AA
Ford XT-11-QDC/WSS-M2C200-D2
GM 19259104
GM 19259105
Honda i-Shift MTF-3
Honda i-Shift MTF-III
Hyundai/Kia 00232-19063
MB 235.10
MB 235.73
MB 317
MB 001 989 26 03 10
MB A 001 989 98 03 09
Shell TF 0870
Toyota/Scion Manual Transmission Oil LV / 08885-81001
VW/Audi G 052 512 A2
VW/Audi G 052 527 A2
VW/Audi G 070 726 A2
VW/Audi G 052 515 A2
VW/Audi G 060 726 A2
VW/Audi G 052 171 A1
VW/Audi G 052 171 A2
VW/Audi G 052 798 A2
VW/Audi G 055 725 A2
VW/Audi G 052 726 A2
VW/Audi G 052 178 A2
Red Line 75W140NS GL-5 Gear Oil
Red Lines’s 75W140NS GL-5 Gear Oil contains all the extreme 
pressure additives in their 75W140 GL-5 oil, but without the friction modifiers to balance slipperiness. This oil is designed for historic and vintage transmissions. Use it in mid-1930s to early-1950s synchro-equipped gearboxes in cars and trucks
Red Lines’s 75W140NS GL-5 Gear Oil reduces noise and helps with rough shifting, especially in trouble-prone A-833 Dodge/Plymouth 4-speed transmissions used from 1964 to 1969. Top off 75W90NS or MT-90 to bring viscosity level up and reduce noise.
75W140NS GL-5 Gear Oil is also used in some clutch-type limited slip differentials in racing to provide maximum lock up.
Red Line’s 75W140NS GL-5 Gear Oil is a fully-synthetic product made from polyol ester base stocks, so it provides excellent lubrication under extreme conditions. Plus, it contains high viscosity-index (VI) to maintain a constant viscosity and film thickness even with varying temperature change
Red Line’s 75W140NS GL-5 Gear Oil exceeds API GL-5 specifications
Compatible for all these applications:
API GL-5 & MT-1
MIL-PRF-2105E
SAE J2360
Designed for historic & vintage synchro transmissions
Rockwell 0-76-C
Used in SAE 140 Applications
Red Line’s MTL® 75W80 GL-4 Gear Oil
Red Line’s MTL® 75W80 GL-4 Gear Oil can be used for BMW, 
Honda/Acura, Ford Focus, late-model Mini Cooper, Land Rover/Range Rover LT77S, Mitsubishi, Dodge & Jeep NV1500, NV3500 , NV3550 and NV5600 truck transmissions. It’s a popular replacement for and improvement over GM Synchromesh® (#12345349), Auto-Trak II® (#12378508) and Chrysler spec MS-9224.
Red Line’s MTL® 75W80 GL-4 Gear Oil doesn’t contain reactive sulfurs, so it’s safe for brass synchros. eliminates notchy shifting, even when cold and its low friction improves power transfer. MTL® 75W80 GL-4 Gear Oil satisfies the gear oil viscosity requirements of 75W, 80W and motor oil viscosities of SAE 30, 10W30 and 5W30. It’s recommended for GL-1, GL-3 and GL-4 applications as well as where most special synchromesh fluids are specified
MTL® 75W80 GL-4 Gear Oil provides the appropriate coefficient of friction for most manual transmission synchronizers (other’s synthetic gear oils are often too slippery for proper synchro engagement). It’s an excellent choice for high-and-low-mile transmissions and is compatible with petroleum oil and other synthetics.
NOTE: MTL, MT-85 & MT-90 are not for use in differentials with hypoid gears
Compatible for all these applications:
API GL-4 / GL-3 / GL-1
SAE 80/80W/75W80
SAE 30/5W30/10W30
Alfa Romeo
Chrysler MS9224
Citroen
Dacia
Daewoo
Fiat
Ford XT-M5-QTS
Genuine Mtf
Gm Auto-Trak II
Gm Synchromesh
Holden
Honda/Acura Genuine MTF
Land Rover/Range Rover MTF 0063
MB 235.10
Mini MTF 94
Mini/BMW 83 22 0 403 247
Mini/BMW 83 22 0 140 516
Mitsubishi #MZ313501
Opel/Vauxhall #09 120 541
Peugeot/Citroen PSA B71 2330 75w80
Renault Clio PT# 77 11
Saab MTF0063
Tata
Volvo MTF 97309-101161745
Volvo M2c 200-C3
VW/Audi G 052 532
VW/Audi G 055 532
Red Line’s MT-85 75W85 GL-4 Gear Oil
Red Line’s MT-85 75W85 GL-4 Gear Oil works well with Nissan 
350Z and 370Z (also most Maxima, Altima & Sentra), Mitsubishi Evolution, Hyundai, Kia and Quaife synchro manual transmission applications, as well as many NV4500 truck transmission applications like Chevy Silverado and Dodge Ram, for Chrysler spec MS-9070.
MT-85 75W85 GL-4 Gear Oil is safe for brass synchros because it doesn’t contain the reactive sulfurs found in most GL-5 oils. It provides quicker shifts and eliminates notchy shifting, even when cold. It also promotes high performance gear protection and longer synchro life.
MT-85 75W85 GL-4 Gear Oil is recommended for GL-1, GL-3 and GL-4 applications as well as where most special synchromesh fluids are specified. It satisfies the gear oil viscosity requirements of 75W, 80W, 85W and motor oil viscosities of SAE 30 and 5W30. It’s an excellent choice for high-and-low-mile transmissions and is compatible with petroleum oil and other synthetics.
NOTE: MTL, MT-85 & MT-90 are not for use in differentials with hypoid gears
Compatible for all these applications:
API GL-4/GL-3/GL-1
SAE 75W85/85
Castrol BOT 0063
Castrol BOT 402
Castrol Syntorq LT
Chrysler/Dodge 4637579
Chrysler/Dodge 4874459
Chrysler/Dodge 4874464
Chrysler/Dodge MS-9070
Fiat/Alfa 9.5550-MZ1
Fuchs-Titan Pro SRG 75
GM 1940182
GM 10953477
GM 12346190
GM 88862472
GM 88862473
GM 93165290
GM 93740319
Hyundai/Kia 04300-00110
Hyundai/Kia 04300-00140
Hyundai/Kia 08950-00020-A
Hyundai/Kia 08950-00020-B
Kia API GL-4 SAE 75W-85, fill for-life
MB 235.4
MB 235.5
MB 001 989 14 03
MB MAN 341 Typ Z4
Mitsubishi 3717610
Mitsubishi DiaQueen Transmission Oil MZ313376
Nissan MTF HQ Multi 999MP-MTF00P
Nissan KE916-99931
Nissan KE916-99932R
Nissan KE916-99942R
Nissan KE916-99962
Nissan KLD26-75802
Nissan MT-XZ
NV4500
Opel B 040 2071
Syntorq LT
VW/Audi G 052 190
VW/Audi G 055 190
Red Line’s MT-90 75W90 GL-4 Gear Oil
Red Line’s MT-90 75W90 GL-4 Gear Oil can be used in Nissan, 
Mazda, Mitsubishi, VW/Audi, Lotus Elise/Exige, Toyota, Mendeola transmissions and Atlas transfer cases for Off Road applications. It provides quicker shifts and is safe for brass synchros because it doesn’t contain reactive sulfur.
MT-90 75W90 GL-4 satisfies the gear oil viscosity requirements of 75W90, 80W90, 90 and motor oil viscosities of SAE 40, 10W40 and 15W40. It’s an excellent choice for high-and-low-mile transmissions and is compatible with petroleum oil and other synthetics.
NOTE: MTL, MT-85 & MT-90 are not for use in differentials with hypoid gears
Recommended for GL-1, GL-3 and GL-4 applications, as well as where most special synchromesh fluids are specified
Compatible for use in:
API GL-4/GL-3/GL-1
SAE 75W90 SAE 90/80W90
SAE 40/10W40/15W40
Alfa Romeo
Audi G 052 911
BMW 81 22 9 407 305
Castrol BOT 130M
Castrol BOT 328
Castrol SAF AG4
Castrol SHC 630
Castrol TAF-X 75w-90
Castrol Syntrans Transaxle 75W-90
Ford F32Z-19C547-MA
Ford M2C175-A
Ford M2C200-B
Ford WSS-M2C203-A1
Ford XT-4-QGL
GM 12345371
GM 12345724
GM 12345871
GM 12346074
GM 89021806
GM 89021807
GM-Daewoo EDS-M-8049
Holden
Hyundai/Kia 08950-00010-A
Jeep 0489722AA
Lotus
Mazda (MES) 115A
Mitsubishi
Nissan Mission Oil MP-G HQ
Opel
Skoda
Toyota 08885-80917
Toyota 08885-81023
Toyota 08885-81026
Vauxhall
VW/Audi G 005 000
VW/Audi G 005 100
VW/Audi G 045 190 A2
VW/Audi G 052 145
VW/Audi G 052 157
VW/Audi G 052 911
VW/Audi G51
VW/Audi G50
Red Line’s 75W90NS GL-5 Gear Oil
Red Line’s 75W90NS GL-5 Gear Oil is designed for transmissions and 
transaxles and helps slow synchros for easier shifting across a broad temperature range. It’s popular in Ferrari, Porsche and Subaru transaxles, as well as muscle Car applications like Ford Top Loader, Muncie transmissions, Borg-Warner T-10 and Super T-10. 75W90NS GL-5 Gear Oil contains extreme pressure additives but without friction modifiers to balance slipperiness. 75W90NS GL-5 Gear Oil offers improved copper corrosion protection to prolong synchro life and helps with lock-up on weak limited-slip differentials-compatible with Red Line Limited Slip Friction Modifier for tuning slippage. Can also be used clutch-type LSDs in racing for maximum lock up. It’s an excellent choice for high-and-low-mile transmissions and is compatible with petroleum oil and other synthetics.
NOTE: MTL, MT-85 & MT-90 are not for use in differentials with hypoid gears
Recommended for API GL-5, GL-6, MT-1, MIL-L-2105E and SAE J2360
Appropriate coefficient of friction for most manual transmission synchronizers (other’s synthetic gear oils are often too slippery for proper synchro engagement)
Compatible for use in:
Porsche N052911CO
Dodge/Jeep 4549636
GM 88862475
Subaru SOA635011
Agip 75W-90 SX
Agip SXA 75W-90
Mobil Mobilube 75W-90 SHC
Mobil Delvac 75W-90
Mobil Mobilube PTX 75W-90
Shell Spirax EP 90
Shell Transaxle Oil 75W-90
Shell Spirax S5 ATE 75W-90