Key Points: With an estimated 37 miles of electric-only driving, the RX 450h+ is practical for daily commutes without gas, but it's price jump above the RX hybrid is hard to justify.The RX's strengths ...

Let's face it, most engine additives don't really improve performances. If you want to try one that does, here's what you should pick.

The crux of the matter lies in that the Formula 1 compression ratio is not measured by sensors during engine operation, but statically. The FIA simply compares the ratio in volume in the cylinder ...