Here's my situation. I drive an average of 1600 miles per week. Mostly highway. My current work car, 89 Honda Accord, uses average 55 gallons of regular per week. Now, to pay .25 cent more per gallon will cost about $55 a month more, if I can get equal MPG with a diesel. So, would $660 a year in added fuel cost be justifiable? Wait, I'll answer that myself, yes, driving an MB over a Honda would be worth it.
But let's look at it from another angle. Is diesel price gonna rise, drop or stay the same? The nation's economy is fueled by diesel. Every commodity we use is delivered by trucks and trains. All 18 wheelers run on it and I don't expect to see any hybrid Kenworths on the road anytime soon. Can the trucking industry keep the price controlled? If they can then you guys (and possibly me) would benefit from that.