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www.bndautomotive.com

I love that GT4. My cars stretch from '74 911 to a '13 RS5 with a mostly Germany mix in between except for an old '84 F250 and ex-Military HMMWV, 24volt electrical system and all.

I've been using Redline 5w-40 for 15yrs in my RS6. Not the Euro formula one but the Regular. It meets 505.01 and has the highest (HTHS) rating of any 5w-40 oil. I have started using BND 7.5w40 in my...