In Reply to: Re: Magnetic Oil Pan Heaters posted by Nate on December 11, 2017 at 11:57:28:
Ok thanks. After I posted I was thinking about how good the modern day multi grade oil actually is and wondered if one was even needed. I use the Rotella 15-40 and I'd think it would be just fine for normal winter temperatures here. Maybe if it was 10 below these things would be ok to use.