Quote:
Originally Posted by spearfish25
Hmmm, interesting. I didn't even think to look. It's been holding up well through the summer heat, autox and a track day. I'm not too worried, but maybe I'll shoot Redline an email.
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I read the spec, D4 and D6 don't seem all that different except for a slight viscosity difference (D6 being thinner) so it's probably fine especially given that you don't drive in the winter.