Is the V6 engine used in some Toyotas the same engine used in Lexus? I'm
> referring specifically to the V6 in the 2007 RX 350, which I recently > purchased. >
> If it is the same engine, does Toyota recommend regular gas? The 2007 > RX350
> specifies premium gas.
>
> Why would Toyota specify regular fuel and Lexus specify premium fuel if > they
> use the same engine?
>
> I have seen past discussions/debates on using regular or premium in the
> Lexus. To date I have only used premium; I only have 5K on the car. >
> I really do like the Lexus. It is a very good automobile.
>
>
The 3.5 liter engine in the RX is the same basic block, but there are some differences in the engine's electronic control unit programming, and perhaps inn compression ratio so that the engine in the RX has slightly more horsepower and torque than in the Toyota applications.