Quote:
Originally Posted by M3takesNYC
This is just plain false. If a car is meant for premium and you use 87 like our cars, than in order to prevent knock the timing is pulled which makes the power from each burn cycle less efficient as less power is made from the fuel mixture. Also the car adds more fuel and richens the mixture to also prevent knock. Rich mixtures lead to less mpg.
Also a dirty air filter can cause lower mpg so while a brand new paper vs oiled there is no difference but paper filters clog quickly and if not changed
often than it will decrease mpg so in that respect a new filter will improve things
|
It is plain true. I did not say that you should use a lower octane than your car was tuned to run on. Cars that are tuned for 87 and put 93 in it won't get better mpg. Cars from the factory are optimized for mpg. From aerodynamics to engine efficiency. It is like people who take off their tailgate in their pickup for better mpg. It actually drops your mpg.