Bought a new 2013 Lexus 300h today and was kinda bummed out that the dealer would not put 18' chrome wheels on this vehicle. His service rep stated that switching the original 17' with 18' wheels will increase the rolling resistance and affect the fuel efficiency. I did some research and found that doing this would increase rolling resistance by 20% or an average 4% reduction in mpg. The car would go from 40 mpg to about 38 mpg. Has anyone with a 2013 ES 300h switched to an aftermarket 18' wheel? Did it affect the digital tire pressure readout on the dashboard? Thanks.
What an idiot your service manager is. As long as it it fits your car you are allowed to do anything you want. They should not need to come up with lame excuses and ideas to keep you from this. This should be excalated to Lexus corporation for hindering your choice of wheels/tires. You should tell them that they are giving you bad reasons and that you got the right wheels with the correct bolts, tire size, etc. Just put on the wheels at another Lexus dealer.