Took a trip from Los Angeles to Vegas this past weekend. I had 3 people and trunk load of luggage. I had to take out my 10 sub cuz it was making my car kinda heavy. It took me 4 1/2 hours to get there. I had a really hard time on the uphills. But, on the flat surfaces i was running up to 110. I didn't think i'd make it through cuz my poor car was having a hard time on the uphilland the rpm was at about 5500. My ears were ringing from my exhaust. It was a fun experience, though. I was running on 32mpg on 89 octane gas.