I don't know about elsewhere but diesel has suddenly become the cheap alternative to gas. For the longest time diesel was priced between regular unleaded and premium. Now it's cheaper than reg. I just filled up at truck/car stop, diesel was $1.47 and 87 octane gasoline was $1.53. My other car requires 91 oct. or higher, and around here that's running about $1.65 a gal. So I think I'll be driving the old diesel more.

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1999 MB SL500 (110,000 mi)
2004 Volvo V70 2.5T (220,000 mi)
2014 Tesla Model S 85 (136,000 mi)
MBCA member