I just bought my 2nd Lexus GS. My first, a 2001 GS300, which I put 120k miles on with very little problems, I ran regular unleaded in all the time. Manual and factory suggested premium. I said no after much research. Now, I have a new GS350 with the new 303HP engine and again, factory, manual and dealership recommend premium unleaded.
Do I REALLY need premium unleaded and do I risk damaging the car if I don't use it?
Thanks for the advice.
Cheers!
JV
B)