A stronger oil like the Red Line fluid will not break down as easily at higher temps. With more power or higher heat the fluid thins out and breaks down which causes the clutches to slip. Red Line DCTF is an upgraded formula that works on normal street cars and holds up better for sustained track time. The OEM DCT fluid is made by Pentosin and works just fine for normal street use. We don't buy in to the lifetime fluid policy and have experienced the benefits of fresh fluid on our daily and track cars. BMW requires a special DCT-specific fluid, although they also label it as "Lifetime Fill". The wet clutch system ensures smooth operation and engagement. The clutch discs are immersed in the same oil used to lubricate the transmission internals. The Double-Clutch transmission uses a set of two clutches that are "wet" clutches.
#Redline gearbox oil for xke manual#
SMG transmissions use the same MTF oil as the manual transmissions, however, the SMG Hydraulic Pump uses Pentosin CHF 11S hydraulic fluid. We have found that the Red Line MT-LV is superior than ATF D4 and factory MTF for these cars in all conditions. Our observations are that these LT fluids are acceptable in normal day-to-day driving and in cold temperatures but are permanently affected by high temps, such as on track. There are discernible differences between them and LT-2 has the strongest following among enthusiasts. The fluid formula has changed over the years - MTF-LT-1, LT-2, LT-3, LT-5, and FFL-4.
The "Lifetime" has never been fully explained and we don't buy into it, especially when fresh fluid typically makes a huge improvement in shift quality and smoothness. This is the era that BMW started using "Lifetime" fluids, indicated by a "MTF" label on the transmission.
For track use, an ATF may become too slippery at high temps, in which case we recommend the Red Line MT-LV which has a slightly heavier weight that holds up better.Ģ000s-2010s M 6-speed and SMG (not DCT) MTF In our experience, it outperforms even fresh factory fluid, especially in colder temps. You can find a Dexron III spec almost anywhere but we are impressed with the performance of Red Line ATF D4 in manual transmissions. Recommended replacement interval: 30,000-40,000 milesġ990s-2000s 5-speed and 6-speed ATF (excluding E46 M3, E9X M3, Z4M)įrom the mid-1990s, nearly all BMW manual transmissions, except 6-speed M models, use a Dexron III ATF oil, indicated by an "ATF" label on the transmission. Because of the narrow applications we don't have a recommended alternative to the Mobil fluid. These transmissions use a specific Mobil SHC 630 synthetic fluid (SAE 90 weight). The 1984-1986 325e/528e should have a green "Special Oil" label on the transmission. However, some transmissions will have an orange ATF label and you should use a Dexron III ATF fluid. If no label is present, the official recommendation is any GL-4 gear oil. Our favorite is the Red Line MTL. Most manual transmissions on vintage models do not have a fluid label on the transmission because nearly all gearboxes took the same fluid - a universal GL-4. Note: for the purposes of this page, "Vintage" refers to all BMW cars built up to and including the E30 3-series.īMW Manual / SMG / DCT Transmission Fluid BMW Transmission & Differential OilThis page covers fluid information and recommendations for BMW manual and automatic transmissions, rear differentials, and front differentials on xDrive models.
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