When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Mine read 600 miles on the first fill up on the way home from purchasing it ( I reset it when I filled up)...The avg MPG was 32.2 all the way home (150 miles)...
My best highway mileage on my C4 (1990) was 29.9... made it to Vegas (abt 450 miles) on a single tank of gas. My 2000 did even better... drove from San Angelo, Tx to Las Vegas (mostly flat terrain) cruising between 70-80 and got 32.9. Manual 6-speed on both cars undoubtedly contributed to mileage. I have had great fun rubbing that 32.9 mpg in the face of my step-father whose Mercury doesn't even get close. I told him he should have bought "an economy car", like mine!
When I drove back from Utah from Oregon via I-15 to US 20. 654 miles . Part is I-15 is freeway (80mph) and US 20 follows the river with corners marked as low as 25 mph, speed limit is 55 mph. I averaged 70.1 mph and got 27.9 mpg which gives me 530 miles per tanks.
Now remember I just got this car and was driving back home so I was not babying it at all.
I drive mine at least 120 miles a day. 90-100 (downhill one way and uphill the other way) miles on the hwy and 20-30 on surface streets. It is hard to average 23mpg. I generally drive to work and back 3 times before the low fuel light comes on. I drive more in a month than a lot of Vette owners do in a year. The only way that anybody is going to get 28 mpg is if you are going on a long, flat, trafficless cruise where you maintain 70-80. Don't believe the hype. For everyday real world driving I would expect 22-24 mpg. 380-420 is on the high side for a tank for normal driving.
I commute 90 miles a day on two lane blacktop, averaging 55-60 mph and consistently get 29-30 mph, no problem. My best was 32mpg on the hwy on a trip. I have an '04 MN6 coupe. I easily get 450 miles of range on the hwy. In fact, I just got back from Carlisle last weekend, had 460 on the trip odometer, and the gas gage was just a hair under a quarter tank. pretty dam good if you ask me!