Hello I just acquired a 87-88 turbocoupe 8.8 and am trying to decide what gear oil and which weight to run. It’s going in an 83 mustang and will be used as a fair weather car.
First off the weight, does it really matter whether I use 75w90 or 75w140?
Secondly which brands do you all like?
Redline Lucas amsoil royal purple etc?
Thanks
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