1979-1993 & 94 Conv [Subscribe to Daily Digest] |
Redline sells the MTL as a 70/80 wt gear oil and also offers MT-90 a 75/90 wt gear oil that is a bit heavier. Both are GL4 rated and it seems like they should be fine replacing a GL4 gear oil. I followed 90k miles of regular GL4 with MTL and have had smooth shifting in cold or hot weather so far at 207k miles.
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