Actually, you aren't helping any car company when you buy used anyway. So what does it matter what brand. My subaru isn't so sporty, but I put it to the test once, and was doing 100 mph with the cruise controll on
That thing is happiest at about 85mph, but then you only get about 23 mpg. No gm car I ever owned would do more than 80 on cruise controll. Around town, I stick to about 60 mph and get 27 mpg. That is, when I drive at all.
THE LIPO RULES. NEVER ABOVE 4.3V NEVER BELOW 2.7V DON'T PUNCTURE
Ideal charging /discharging range for Lipo, 3.65v minimum 4.1v maximum
See battery technology section, FAQ thread at the top of the page for lipo noob info.