I have 0.75l of synthetic blend GL-4/5 gear oil sitting on the shelf. I need ~ 1.25l for my MT. I am thinking of blending in 0.5l of 5w-30 motor oil rather than buying some more gear oil. My thinking is that I wouldn’t mind thinning it out a little for the cold winters here -- and seeing how the concoction works.
Any issues in blending a motor oil and gear oil?
It’s for a 1987 1.8 MT-5-speed Jetta. The owners manual says Hypoid-oil SAE 80/80w-90 …Mil-L-2105 or API-GL-4. The Haynes manual says GL-5 80w-90.
I imagine that I would probably be giving up some wear protection, but it shouldn’t be too much considering a good portion of the mix is gear oil. I’ve seen several posts where in Honda MT’s they were actually spec’ing and using motor oils.
Any issues in blending a motor oil and gear oil?
It’s for a 1987 1.8 MT-5-speed Jetta. The owners manual says Hypoid-oil SAE 80/80w-90 …Mil-L-2105 or API-GL-4. The Haynes manual says GL-5 80w-90.
I imagine that I would probably be giving up some wear protection, but it shouldn’t be too much considering a good portion of the mix is gear oil. I’ve seen several posts where in Honda MT’s they were actually spec’ing and using motor oils.