kb

Both are synthetic and 75w 90. Changing transmission/gear oil this weekend and called local Porsche dealership asking about Mobil 1 Delvac. Said they do not sell in quarts but then service rep said to try BG Ultra Guard because they have used it with great success. 2 years ago, I used Lubro Moly and although gears shift great, i started hearing a slight crunch from 3rd to 2nd gear. Gurus out there, what do you suggest? Cannot find Redline shockproof anywhere either. Can you mix the same weight lube 75w 90 oils from say Mobil 1 and Swepco? Thanks

matt777

I've never heard of BG Ultra Guard. You can get Delvac in 1 gallon containers. The Amsoil stuff worked fine for me too.

kb

Thanks. Service Rep also said it is ok to mix brands which is why I asked the question.